airjakub2's Notes:

Player ages are computed as their age on June 30th

  Cnt Player            **OPS **  PA Year Age Tm  Lg  G   AB  R   H  2B 3B HR RBI  BB IBB  SO HBP  SH  SF GDP  SB CS   BA   OBP   SLG   OPS  Positions
 ----+-----------------+--------+---+----+---+---+--+---+---+---+---+--+--+--+---+---+---+---+---+---+---+---+---+--+-----+-----+-----+-----+--------- 
    1 Ty Cobb              167   646 1907  20 DET AL 150 605  97 212 28 14  5 119  24   0   0   5  12   0   0  49  0  .350  .380  .468  .848 *9        
    2 Mel Ott              165   674 1929  20 NYG NL 150 545 138 179 37  2 42 151 113   0  38   6  10   0   0   6  0  .328  .449  .635 1.084 *9/4      
    3 Al Kaline            162   681 1955  20 DET AL 152 588 121 200 24  8 27 102  82  12  57   5   0   6  13   6  8  .340  .421  .546  .967 *9        
    4 Mickey Mantle        162   626 1952  20 NYY AL 142 549  94 171 37  7 23  87  75   0 111   0   2   0   5   4  1  .311  .394  .530  .924 *89/5     
    5 Alex Rodriguez       160   677 1996  20 SEA AL 146 601 141 215 54  1 36 123  59   1 104   4   6   7  15  15  4  .358  .414  .631 1.045 *6        
    6 Ted Williams         160   677 1939  20 BOS AL 149 565 131 185 44 11 31 145 107   0  64   2   3   0  10   2  1  .327  .436  .609 1.045 *9        
    7 Rogers Hornsby       150   550 1916  20 STL NL 139 495  63 155 17 15  6  65  40   0  63   4  11   0   0  17  0  .313  .369  .444  .813 *563/4    
    8 Jimmie Foxx          148   473 1928  20 PHA AL 118 400  85 131 29 10 13  79  60   0  43   1  12   0   0   3  8  .328  .416  .548  .964 *532      
    9 Dick Hoblitzel       144   592 1909  20 CIN NL 142 517  59 159 23 11  4  67  44   0   0   2  29   0   0  17  0  .308  .364  .418  .782 *3        
   10 Frank Robinson       143   668 1956  20 CIN NL 152 572 122 166 27  6 38  83  64   7  95  20   8   4  14   8  4  .290  .379  .558  .937 *78       
   11 Mel Ott              138   499 1928  19 NYG NL 124 435  69 140 26  4 18  77  52   0  36   2  10   0   0   3  0  .322  .397  .524  .921 *9/4785   
   12 Ken Griffey          135   666 1990  20 SEA AL 155 597  91 179 28  7 22  80  63  12  81   2   0   4  12  16 11  .300  .366  .481  .847 *8/D      

Seasons/Careers found: 12.

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