Via Baseball-Reference.com’s Play Index Pitching Season Finder, here are the Yankees pitchers, since 1973, who had at least 20 IP with the Yankees, during their first season in the majors, where they were 25-years old or younger and had an ERA+ of 90 or greater:

  Cnt                       ERA+   IP  Year Age
+----+-----------------+---+----+-----+----+---+
    1 Bob Wickman             96  50.1 1992  23
    2 Chien-Ming Wang        105 116.1 2005  25
    3 Bob Tewksbury          124 130.1 1986  25
    4 Andy Pettitte          111 175   1995  23
    5 Alan Mills              97  41.2 1990  23
    6 Sam Militello          114  60   1992  22
    7 Tim Lollar             117  32.1 1980  24
    8 Jeff Karstens          119  42.2 2006  23
    9 Domingo Jean            93  40.1 1993  24
   10 Philip Hughes          100  72.2 2007  21
   11 Ray Fontenot           116  97.1 1983  25
   12 Brian Fisher           169  98.1 1985  23
   13 Doug Drabek            100 131.2 1986  23
   14 Ken Clay                90  55.2 1977  23
   15 Joba Chamberlain      1192  24   2007  21
   16 Jim Beattie             97 128   1978  23
   17 Jason Anderson          92  20.2 2003  24

Seasons/Careers found: 17.

I’m still not sure what to make of this list – but, it’s an interesting one to look at, nonetheless.