The purpose of this page is to compare Mariano Rivera with some of the better relievers in the history of baseball. Of the ones listed, only 5 (they are underlined) are in the Hall of Fame One of these, Dennis Eckersley, spent part of his career as a starting pitcher, as well, so some of his numbers are larger because of that.

This is not to say that Mo is better than any of these guys, necessarily. It is ordered by the ERA+ stat. This stat measures the difference of a pitchers real ERA from the average ERA in Major League Baseball in that particular season. The higher the stat is, the larger the difference and the better that the pitcher's season was, ERA wise. So, this page is basically comparing the career adjusted ERAs of these players.

Pitcher Comparison
Glossary
Name          Seasons ERA+   W   L   S    G  GS  GF     IP  HR    BF  ERA
-----------+---------+----+---+---+---+----+---+---+------+---+-----+----
Rivera 1995-2013 205 82 60 652 1115 10 952 1283.7 71 5103 2.21
Wagner 1995-2010 187 47 40 422 853 0 703 903.0 82 3600 2.31
Wilhelm 1952-1972 147 143 122 227 1070 52 651 2254.3 150 9164 2.52
Quisenberry 1979-1990 147 56 46 244 674 0 553 1043.3 59 4247 2.76
Percival 1995-2009 147 35 43 358 703 1 546 708.7 85 2915 3.17
Hoffman 1993-2010 141 61 75 601 1035 0 856 1089.3 100 4388 2.87
Franco 1984-2005 138 90 87 424 1119 0 774 1245.7 81 5312 2.89
Sutter 1976-1988 136 68 71 300 661 0 512 1042.3 77 4251 2.83
Smith 1980-1997 132 71 92 478 1022 6 802 1289.3 89 5387 3.03
Lyle 1967-1982 128 99 76 238 899 0 634 1390.3 84 5794 2.88
Gossage 1972-1994 126 124 107 310 1002 37 681 1809.3 119 7506 3.01
Myers 1985-1998 123 44 63 347 728 12 548 884.7 69 3744 3.19
Reardon 1979-1994 122 73 77 367 880 0 695 1132.3 109 4720 3.16
Fingers 1968-1985 120 114 118 341 944 37 709 1701.3 123 6942 2.90
Eckersley 1975-1998 116 197 171 390 1071 361 577 3285.7 347 13534 3.50
Righetti 1979-1995 114 82 79 252 718 89 474 1403.7 95 5988 3.46
-----------+---------+----+---+---+---+----+---+---+------+---+-----+----
Special thanks to Baseball-Reference.com for the data.