Almost as good as April 30, 2005, with Wang up against Bush.
Wang came through:
http://www.baseball-reference.com/bo...00504300.shtml
Edit:
Zink? They're thinking of bringing up Zink?
I would absolutely love to see that. The MLE of a AA or AAA knuckleball pitcher is his actual stat line: MLB batters are no better at hitting knuckleballs than AA or AAA batters. Zink's career MiLB ERA is 4.26--he might have MLB-caliber stuff, and we'll never know unless he gets a chance.