For single seasons, For 2008, (requiring IP≥182, ERA≤3.91, and birth_year≥1984), sorted by oldest

Player ages are computed as their age on June 30th

  Cnt                         IP    ERA  BrYr Year Age Tm  Lg  G   GS CG SHO GF  W  L  W-L% SV  H   R   ER  BB  SO ERA  HR  BF   AB  2B 3B IBB HBP  SH  SF GDP  SB CS Pk BK WP   BA   OBP   SLG   OPS  OPS   Pit  Str
 ----+-----------------+---+-----+------+----+----+---+---+--+---+---+--+---+--+--+--+-----+--+---+---+---+---+---+----+--+----+----+--+--+---+---+---+---+---+---+--+--+--+--+-----+-----+-----+-----+----+----+---- 
    1 Tim Lincecum          220     2.66 1984 2008  24 SFG NL  33  32  2   1  0 17  5  .773  0 178  71  65  82 252  162 11  902  800 38  3   1   6  11   3  23  19  2  0  2 17  .223  .299  .319  .618   66 3577 2262 
    2 Mike Pelfrey          200.2   3.72 1984 2008  24 NYM NL  32  32  2   0  0 13 11  .542  0 209  86  83  64 110  111 12  851  758 45  4   1  13  11   5  29   5  6  4  0  2  .276  .340  .393  .733   99 3315 2017 
    3 Jon Lester            210.1   3.21 1984 2008  24 BOS AL  33  33  2   2  0 16  6  .727  0 202  78  75  66 152  143 14  874  789 44  1   1  10   6   3  27   8  5  3  1  3  .256  .320  .368  .688   78 3309 2110 
    4 John Lannan           182     3.91 1984 2008  23 WSN NL  31  31  0   0  0  9 15  .375  0 172  89  79  72 117  110 23  779  682 28  2   1   7  13   5  19  18  7  4  2  6  .252  .328  .400  .728   94 2936 1792 
    5 John Danks            187     3.47 1985 2008  23 CHW AL  32  32  0   0  0 11  9  .550  0 180  74  72  54 155  132 15  778  716 44  1   1   4   2   2  14  23  8  6  0  7  .251  .307  .378  .685   78 3040 1977 
    6 Matt Cain             217.2   3.76 1984 2008  23 SFG NL  34  34  1   1  0  8 14  .364  0 206  95  91  91 186  114 19  933  821 49  8   9   7   7   7  10  13 10  0  2  7  .251  .328  .400  .728   95 3598 2323 
    7 Chad Billingsley      200.2   3.14 1984 2008  23 LAD NL  35  32  1   1  1 16 10  .615  0 188  76  70  80 201  141 14  859  758 33  6   6   8   8   5  18   8  4  0  0 10  .248  .324  .363  .687   82 3322 2088 
    8 Felix Hernandez       200.2   3.45 1986 2008  22 SEA AL  31  31  2   0  0  9 11  .450  0 198  85  77  80 175  121 17  857  759 48  0   7   8   4   6  28  19  4  1  1  8  .261  .335  .391  .726   96 3194 2025 
    9 Jair Jurrjens         188.1   3.68 1986 2008  22 ATL NL  31  31  0   0  0 13 10  .565  0 188  87  77  70 139  112 11  813  722 40  8   9   4  12   5  16  28  3  0  0  3  .260  .327  .384  .711   93 3077 1933 

Seasons/Careers found: 9.

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