377:, a pitcher in the 1870s, to third with 151. Among qualifying pitchers, Pedro MartĂnez has the most separate seasons with an ERA+ over 200, with five, and the most consecutive 200 ERA+ seasons (4), though the closer Rivera, with too few innings each year to qualify officially, has surpassed 200 ERA+ in 13 seasons of his 19 seasons, including 4 consecutive seasons twice and 5 consecutive seasons once and also surpassing 300 in 2004 and again in 2008.
25:
318:
The average ERA+ is set to be 100; a score above 100 indicates that the pitcher performed better than average, while below 100 indicates worse than average. For instance, imagine the average ERA in the league is 4.00: if pitcher A has an ERA of 4.00 but is pitching in a ballpark that favors hitters,
322:
As a result, ERA+ can be used to compare pitchers across different run environments. In the above example, while ERA will lead one to believe that both pitchers pitched at the same level due to their ERAs being equivalent, ERA+ indicates that pitcher A performed better than pitcher B. ERA+ can thus
399:
Single-season leaders include only pitchers eligible for the ERA title (a pitcher must throw a minimum of one inning per game scheduled for his team during the season to qualify for the ERA title). Only pitchers with 1,000 or more innings pitched are shown in the career leader list.
314:
189:
1230:
Single season awards require a minimum of one inning pitched for each game played (thus usually 162 IP in today's game). Thus closers and other relievers will not generally acquire enough innings pitched to
373:
whose career ERA+ is 205. Upon retirement in 2013, with an ERA+ of 194 in his final season, Rivera's career record of 205 surpassed the record among retired players of 154, held by MartĂnez, bumping
204:
briefly used a different formula which took values strictly between 0 and 200 instead of between 0 and infinity, but the current website shows values above 200 so it is clearly no longer in use:
209:
103:
1243:
987:
909:
319:
his ERA+ will be over 100. Likewise, if pitcher B has an ERA of 4.00 but pitches in a ballpark favoring pitchers, then his ERA+ will be below 100.
1335:
355:
358:) and so Gibson's ERA+ is 258, eighth highest since 1900. 1968 was the last year that Major League Baseball employed the use of a
1585:
1590:
1092:
1008:
812:
1746:
1580:
1240:
1328:
393:
309:{\displaystyle {\mathit {ERA+}}=100\cdot (2-{{\mathit {ERA}} \over {\mathit {lgERA}}}\cdot {1 \over {\mathit {PF}}})}
1701:
1528:
1518:
1293:
1259:
1801:
1731:
1271:
1842:
1321:
1260:
Baseball
Reference career ERA+ leaders, accessed June 6, 2021. Also the source for the corresponding table.
323:
be used to neutralize the effects of some well-known advantages and disadvantages on pitchers' ERA scores.
1360:
1217:
1060:
347:
184:{\displaystyle {\mathit {ERA+}}=100\cdot {{\mathit {lgERA}} \over {\mathit {ERA}}}\cdot {\mathit {PF}}}
1177:
1615:
1570:
1462:
758:
1811:
1791:
1756:
1668:
1495:
201:
1816:
1452:
1412:
1071:
1796:
1716:
1605:
8:
1786:
1706:
1663:
1638:
1510:
1370:
1344:
1147:
930:
334:
holds the modern record for highest ERA+ in a single season; he posted a 1.74 ERA in the
194:
39:
1192:
38:
Please expand the article to include this information. Further details may exist on the
1630:
1620:
1555:
1365:
1352:
359:
79:
193:
Where ERA is the pitcher's ERA, lgERA is the average ERA of the league, and PF is the
1776:
1726:
1643:
1390:
1385:
1380:
1130:
1109:
1081:
997:
802:
658:
370:
87:
961:
768:
471:
331:
1711:
1653:
1427:
351:
335:
1538:
1533:
1523:
1500:
1467:
1437:
1247:
846:
530:
442:
339:
365:
The career record for ERA+ (with a minimum of 1,000 innings pitched) is held by
1741:
1543:
1485:
1442:
1400:
1375:
1100:
1050:
979:
972:
940:
898:
888:
867:
823:
779:
685:
631:
590:
547:
510:
428:
366:
342:, which had an average ERA of 4.92, which gave MartĂnez an ERA+ of 291. While
1193:"We Goofed: ERA+ numbers » Baseball-Reference Blog » Blog Archive"
1836:
1771:
1721:
1658:
1600:
1595:
1565:
1457:
1447:
1432:
1422:
1119:
1039:
1029:
1018:
695:
668:
557:
378:
1766:
1761:
1683:
1477:
1407:
1138:
951:
834:
790:
711:
703:
675:
577:
520:
457:
1781:
1673:
1490:
1417:
877:
856:
641:
618:
497:
382:
1821:
1736:
1610:
1548:
919:
604:
567:
484:
374:
343:
1313:
1696:
1575:
1560:
747:
1751:
1395:
648:
540:
83:
75:
71:
24:
1648:
1806:
362:
at 15 inches (380 mm), since 10 inches (250 mm).
296:
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267:
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224:
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218:
176:
161:
158:
148:
145:
142:
139:
118:
115:
112:
1294:"Single-Season Leaders & Records for Adjusted ERA+"
354:), the average ERA was 2.99 that year (the so-called
212:
106:
308:
183:
90:or pitchers) and the ERA of the pitcher's league.
1834:
346:has the lowest ERA in modern times (1.12 in the
1329:
1272:"Official Rules: 10.00 The Official Scorer"
1336:
1322:
1241:Baseball Trivia (General) - Pitchers mound
396:and have not announced their retirement.
1123:
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965:
689:
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635:
627:
561:
553:
534:
526:
514:
506:
36:about who coined the term adjusted ERA+.
1343:
200:This formula is now standard, although
1835:
1317:
1178:"Adjusted Earned Run Average (ERA+)"
403:
18:
381:topped a 200 ERA+ three times, and
13:
1747:Jaffe Wins Above Replacement Score
1190:
293:
264:
251:
215:
173:
155:
136:
109:
14:
1854:
82:(ERA) according to the pitcher's
1702:Batting average on balls in play
392:are active as of the end of the
23:
1286:
1264:
1253:
1234:
1224:
1210:
1184:
1170:
303:
238:
62:, often simply abbreviated to
1:
1802:Value over replacement player
1732:Fielding independent pitching
1163:
86:(in case the ballpark favors
1218:"Esoteric Ramblings About +"
1064:
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1001:
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772:
751:
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197:of the pitcher in question.
7:
10:
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1197:www.baseball-reference.com
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78:. It adjusts a pitcher's
1807:Weighted on-base average
1616:Strikeout-to-walk ratio
1463:Walk-to-strikeout ratio
1274:. Major League Baseball
98:ERA+ is calculated as:
1812:Wins Above Replacement
1792:Out of zone plays made
1669:Defensive indifference
1496:Stolen base percentage
1298:Baseball-Reference.com
722:Single Season Leaders
385:had two such seasons.
338:while pitching in the
310:
202:Baseball-Reference.com
185:
34:is missing information
1817:Win probability added
1453:On-base plus slugging
1072:Philadelphia Phillies
311:
186:
1797:Ultimate zone rating
1717:Defensive Runs Saved
210:
104:
1843:Pitching statistics
1707:Batting park factor
1639:Fielding percentage
1371:Slugging percentage
1345:Baseball statistics
1148:Los Angeles Dodgers
988:Washington Senators
931:St. Louis Cardinals
910:Washington Senators
723:
410:
356:Year of the Pitcher
1757:Power–speed number
1529:Pitchers of record
1366:On-base percentage
1246:2009-04-18 at the
721:
408:
306:
181:
80:earned run average
16:Baseball statistic
1830:
1829:
1777:Secondary average
1727:Extrapolated Runs
1250:, allexperts.com.
1160:
1159:
1153:
1152:
1131:Toronto Blue Jays
1110:Chicago White Sox
1082:Christy Mathewson
998:Christy Mathewson
803:Cleveland Indians
717:
716:
659:Christy Mathewson
301:
281:
166:
57:
56:
1850:
1664:Fielder's choice
1428:Game-winning RBI
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1678:
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1519:Win–loss record
1505:
1501:Caught stealing
1472:
1468:Walk percentage
1361:Batting average
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1248:Wayback Machine
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1093:New York Giants
1009:New York Giants
847:Cincinnati Reds
531:Dan Quisenberry
443:Clayton Kershaw
409:Career Leaders
360:pitcher's mound
348:National League
340:American League
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1465:
1460:
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1443:Sacrifice bunt
1440:
1435:
1430:
1425:
1420:
1415:
1410:
1405:
1404:
1403:
1401:Extra-base hit
1398:
1393:
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1368:
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1310:
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1233:
1223:
1209:
1191:Forman, Sean.
1183:
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1142:
1134:
1133:
1128:
1125:
1122:
1117:
1113:
1112:
1107:
1104:
1101:Dallas Keuchel
1096:
1095:
1090:
1087:
1084:
1079:
1075:
1074:
1069:
1066:
1063:
1061:Pete Alexander
1058:
1054:
1053:
1051:Houston Astros
1048:
1045:
1042:
1037:
1033:
1032:
1027:
1024:
1021:
1016:
1012:
1011:
1006:
1003:
1000:
995:
991:
990:
985:
982:
980:Walter Johnson
976:
975:
973:Boston Red Sox
970:
967:
964:
962:Pedro MartĂnez
959:
955:
954:
949:
946:
943:
941:Mordecai Brown
938:
934:
933:
928:
925:
922:
917:
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912:
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904:
901:
899:Walter Johnson
896:
892:
891:
889:Atlanta Braves
886:
883:
880:
875:
871:
870:
868:Atlanta Braves
865:
862:
859:
854:
850:
849:
844:
841:
838:
831:
827:
826:
824:Boston Red Sox
821:
818:
815:
810:
806:
805:
800:
797:
794:
787:
783:
782:
780:Boston Red Sox
777:
774:
771:
769:Pedro MartĂnez
766:
762:
761:
756:
753:
750:
745:
741:
740:
737:
734:
731:
728:
718:
715:
714:
708:
707:
699:
698:
692:
691:
688:
686:Pete Alexander
683:
679:
678:
672:
671:
665:
664:
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656:
652:
651:
645:
644:
638:
637:
634:
632:Mordecai Brown
629:
625:
624:
621:
616:
612:
611:
608:
601:
597:
596:
593:
591:Trevor Hoffman
588:
584:
583:
580:
575:
571:
570:
564:
563:
560:
555:
551:
550:
548:Smoky Joe Wood
544:
543:
537:
536:
533:
528:
524:
523:
517:
516:
513:
511:Walter Johnson
508:
504:
503:
500:
495:
491:
490:
487:
482:
478:
477:
474:
472:Pedro MartĂnez
469:
465:
464:
461:
454:
450:
449:
446:
439:
435:
434:
431:
429:Mariano Rivera
426:
422:
421:
420:Adjusted ERA+
418:
415:
402:
367:Mariano Rivera
332:Pedro MartĂnez
328:
325:
305:
298:
295:
290:
285:
278:
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92:
55:
54:
48:September 2015
31:
29:
22:
15:
9:
6:
4:
3:
2:
1855:
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1800:
1798:
1795:
1793:
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1778:
1775:
1773:
1772:Runs produced
1770:
1768:
1765:
1763:
1760:
1758:
1755:
1753:
1750:
1748:
1745:
1743:
1740:
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1735:
1733:
1730:
1728:
1725:
1723:
1722:Exit velocity
1720:
1718:
1715:
1713:
1712:Catcher's ERA
1710:
1708:
1705:
1703:
1700:
1698:
1695:
1693:
1692:Adjusted ERA+
1690:
1689:
1687:
1685:
1681:
1675:
1672:
1670:
1667:
1665:
1662:
1660:
1659:Total chances
1657:
1655:
1652:
1650:
1647:
1645:
1642:
1640:
1637:
1636:
1634:
1632:
1628:
1622:
1619:
1617:
1614:
1612:
1609:
1607:
1604:
1602:
1601:Complete game
1599:
1597:
1596:Quality start
1594:
1592:
1589:
1587:
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1582:
1579:
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1572:
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1489:
1487:
1484:
1483:
1481:
1479:
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1469:
1466:
1464:
1461:
1459:
1458:Times on base
1456:
1454:
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1449:
1448:Sacrifice fly
1446:
1444:
1441:
1439:
1436:
1434:
1431:
1429:
1426:
1424:
1421:
1419:
1416:
1414:
1411:
1409:
1406:
1402:
1399:
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1389:
1387:
1384:
1382:
1379:
1378:
1377:
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1319:
1316:
1299:
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1213:
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1149:
1146:
1143:
1141:
1140:
1136:
1135:
1132:
1129:
1126:
1121:
1120:Roger Clemens
1118:
1114:
1111:
1108:
1105:
1103:
1102:
1098:
1097:
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1091:
1088:
1083:
1080:
1076:
1073:
1070:
1067:
1062:
1059:
1056:
1055:
1052:
1049:
1046:
1041:
1040:Roger Clemens
1038:
1035:
1034:
1031:
1030:New York Mets
1028:
1025:
1020:
1019:Dwight Gooden
1017:
1014:
1013:
1010:
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1004:
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996:
993:
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989:
986:
983:
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819:
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813:Dutch Leonard
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767:
764:
763:
760:
757:
754:
749:
746:
743:
742:
738:
735:
733:Adjusted ERA+
732:
729:
726:
725:
719:
713:
710:
709:
706:
705:
701:
700:
697:
696:Randy Johnson
694:
693:
687:
684:
680:
677:
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670:
669:Johan Santana
667:
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592:
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579:
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569:
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559:
558:Roger Clemens
556:
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1767:Runs created
1762:Range factor
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1684:Sabermetrics
1571:Perfect game
1478:Base running
1408:Hits per run
1301:. Retrieved
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1200:. Retrieved
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1139:Zack Greinke
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952:Chicago Cubs
835:Trevor Bauer
833:
791:Shane Bieber
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712:Rube Waddell
704:Corey Kluber
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1782:Speed Score
1674:Passed ball
1491:Stolen base
1418:Total bases
878:Greg Maddux
857:Greg Maddux
642:John Franco
619:Kid Nichols
498:Lefty Grove
394:2020 season
388:Players in
383:Greg Maddux
336:2000 season
195:park factor
1822:Win Shares
1737:Game score
1611:Wild pitch
1413:Grand slam
1303:2020-11-20
1278:15 October
1164:References
920:Bob Gibson
605:Chris Sale
568:Addie Joss
485:Jim Devlin
375:Jim Devlin
344:Bob Gibson
1697:Base runs
1576:No-hitter
1561:Strikeout
748:Tim Keefe
284:⋅
245:−
236:⋅
169:⋅
130:⋅
40:talk page
1837:Category
1752:Pop time
1631:Fielding
1511:Pitching
1396:Home run
1244:Archived
1231:qualify.
1202:1 August
649:Cy Young
541:Ed Walsh
84:ballpark
76:baseball
72:pitching
68:ERA plus
1606:Shutout
1353:Batting
327:Leaders
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88:batters
70:, is a
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1116:T-19
1078:T-17
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739:Team
682:T-24
655:T-21
628:T-18
554:T-12
1787:NERD
1586:BB/9
1581:WHIP
1566:Walk
1539:Hold
1534:Save
1438:Bunt
1433:Walk
1280:2016
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1144:2015
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1106:2020
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1068:1915
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969:1999
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414:Rank
390:bold
369:, a
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64:ERA+
1591:K/9
1556:ERA
1544:Run
1486:Run
1423:RBI
1376:Hit
1124:222
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1065:225
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1044:226
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