For single seasons, From 1901 to 2007, (requiring W=5, L=5, and GS=5), sorted by smallest GS

  Cnt Player            **GS**  W  L Year Age Tm  Lg  G  CG SHO GF  W-L% SV   IP   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 Jose Parra           5    5  5 1996  23 MIN AL  27  0   0  7  .500  0  70    88  48  47  27  50   6.04   84 15  320  286 16  2   0   3   1   3   6   3  3  0  1  4  .308  .370  .535  .905  125           
    2 Bill Landis          5    5  5 1969  26 BOS AL  45  0   0  9  .500  1  82.1  82  53  48  49  50   5.25   73  7  369  305 20  3   3   3   7   5   7   4  5  0  1  5  .269  .370  .423  .793  121           
    3 Cal Koonce           5    5  5 1966  25 CHC NL  45  0   0 14  .500  2 108.2 113  57  46  35  65   3.81   97 13  472  422 16  3   9   1   8   6   7   8  4  1  0  2  .268  .321  .412  .733  105           
    4 Jim Brosnan          5    5  5 1957  27 CHC NL  41  1   0 17  .500  0  98.2  79  38  37  46  73   3.38  116 11  413  361 12  0   4   1   4   2   6   3  1  0  0  2  .219  .307  .343  .650   81           
    5 Don Brennan          5    5  5 1935  31 CIN NL  38  2   1 18  .500  5 114.1 101  43  40  44  48   3.15  126  4  477                  4                        1  1                            0           
    6 Herb Pennock         5    5  5 1917  23 BOS AL  24  4   1 13  .500  1 100.2  90  42  37  23  35   3.31   78  2  397                  3                        0  0                            0           

Seasons/Careers found: 6.

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