In looking over his minor league stats he's really only had one year that stands out as anything special, his 2005 season at high-A Daytona/AA West Tenn. He's given up just over a hit per inning in the minors, with a so-so 1.34 whip. And he'll be 27 in August.
That being said, he's obviously been outstanding in his five starts with the big club. I realize that there's no chance that he'll be able to keep putting up some of the numbers he's produced so far (24 hits in 37 innings, .911 whip), I am curious about what some of you who have followed him more closely think. Is he viable for the rotation for the rest of the year? What is his upside considered to be?