Playing for the NYY, For single seasons, From 1973 to 2008, Younger than 25, (requiring ERAp≥100, GS≥3, G≥3, and IP≤100), sorted by greatest ERAp

Player ages are computed as their age on June 30th

  Cnt Player            ERA   GS  G    IP  Year Age Tm
 ----+-----------------+----+---+---+-----+----+---+--- 
    1 Ian Kennedy        236   3   3  19   2007  22 NYY 
    2 Alfredo Aceves     180   4   6  30   2008  25 NYY 
    3 Marty Bystrom      128   7   7  39.1 1984  25 NYY 
    4 Jeff Karstens      119   6   8  42.2 2006  23 NYY 
    5 Ray Fontenot       116  15  15  97.1 1983  25 NYY 
    6 Sam Militello      114   9   9  60   1992  22 NYY 
    7 Dave Eiland        112   5   5  30.1 1990  23 NYY 
    8 Dave Righetti      112   3   3  17.1 1979  20 NYY 
    9 Sterling Hitchcoc  110   5  23  49.1 1994  23 NYY 
   10 Jeff Weaver        109   8  15  78   2002  25 NYY 
   11 Joe Cowley         107  11  16  83.1 1984  25 NYY 
   12 Eric Plunk         105   7  27  75.2 1989  25 NYY 
   13 Darrell Rasner     102   3   6  20.1 2006  25 NYY 
   14 Al Leiter          101  14  14  57.1 1988  22 NYY 
   15 Philip Hughes      100  13  13  72.2 2007  21 NYY 

Seasons/Careers found: 15.

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