For single seasons, From 1901 to 2007, (requiring IP≥120, SOp9≥9, and At least 100% games in relief), sorted by most recent date

  Cnt Player            Year   IP   SO/9 Age Tm  Lg  G  GS CG SHO GF  W  L  W-L% SV  H   R   ER  BB  SO   ERA  ERA  HR  BF   AB  2B 3B IBB HBP  SH  SF GDP  SB CS Pk BK WP   BA   OBP   SLG   OPS  OPS   Pit  Str
 ----+-----------------+----+-----+-----+---+---+--+---+--+--+---+--+--+--+-----+--+---+---+---+---+---+------+----+--+----+----+--+--+---+---+---+---+---+---+--+--+--+--+-----+-----+-----+-----+----+----+---- 
    1 Lance McCullers   1987 123.1  9.19  23 SDP NL  78  0  0   0 41  8 10  .444 16 115  60  51  59 126   3.72  106 11  540  471 27  1  11   2   6   2   5  15  8  0  1  5  .244  .330  .376  .706   96           
    2 Mark Eichhorn     1986 157    9.52  25 TOR AL  69  0  0   0 38 14  6  .700 10 105  32  30  45 166   1.72  248  8  612  548 23  3  14   7   9   2  12  15  5  0  1  2  .192  .261  .288  .549   47           
    3 Rich Gossage      1977 133   10.22  25 PIT NL  72  0  0   0 55 11  9  .550 26  78  27  24  49 151   1.62  243  9  523  459 11  0   6   2   7   6   7   9  3  0  0  2  .170  .250  .253  .503   38           
    4 Dick Selma        1970 134.1 10.25  26 PHI NL  73  0  0   0 47  8  9  .471 22 108  42  41  59 153   2.75  146  8  552  478 16  1   9   4   9   3  10   8  8  2  1 10  .226  .314  .314  .628   75           
    5 Dick Radatz       1964 157   10.38  27 BOS AL  79  0  0   0 67 16  9  .640 29 103  44  40  58 181   2.29  168 13  635  553 19  5   9   7   9   7   5  10  7  0  0  1  .186  .269  .309  .578   62           
    6 Dick Radatz       1963 132.1 11.02  26 BOS AL  66  0  0   0 58 15  6  .714 25  94  31  29  51 162   1.97  191  9  541  468  8  2  13   5  14   3   5   5  2  0  0  5  .201  .285  .284  .569   62           
    7 Dick Radatz       1962 124.2 10.40  25 BOS AL  62  0  0   0 53  9  6  .600 24  95  32  31  40 144   2.24  184  9  506  450 18  6   2   4   5   5   5   5  2  0  0  4  .211  .279  .338  .617   68           

Seasons/Careers found: 7.

 Photos from the George Grantham Bain Collection at the Library of Congress.