The-24-year old right-hander, a 24th-round pick in 2010, can be considered old for his league but guess what? Skeptics were saying the same about Edwar Cabrera last year and he's still excelling and now at Triple-A, one short trip away from a roster spot with the Rockies.
Bergman lacks Cabrera's strikeout ability but is on the same path up the ladder, with constant momentum. It wasn't until this season at Double-A that Cabrera found a way to miss way more bats so Bergman has time to do the same, which he will have to do to remain a prospect as a starter.
Of course, Cabrera getting out of the California League helped him as a pitcher, as it will Bergman one day too.
For now, check this numbers out on Bergman over the last season and a half, or 33 starts, roughly the equivalent of a full major-league season - 208 2/3 innings pitched, 187 hits allowed, 152 strikeouts and 35 walks with only 12 homers. That's success.
He's not dominant but he's highly effective and that is playing well for him.