1
Andrew Baldwin, 2007 in West Tenn:
166 IP, 12 HR, 19 BB, 115 K or 0.7 HR/9, 1.0 BB/9, 6.2 K/9 and 193 H or 10.5 H/9
I noticed that he'd pitched 8 IP so far in Tacoma without a walk and looked him up.
Career in 7 MiLB seasons: 0.8 HR/9, 1.8 BB/9, 5.9 K/9 and 10.1 H/9
http://www.baseball-reference.com/minors/player.cgi?id=baldwi001and
Fister: 0.8 HR/9, 2.2 BB/9, 6.6 K/9 and 10.4 H/9
http://www.baseball-reference.com/minors/player.cgi?id=fister001dou
But the career numbers would obscure the "plateau-leap" argument.