22-year old lefty swinging outfielder Tyler Colvin was the #3 prospect in the Cubs’ minor league system coming into this season according to Baseball America but he isn’t playing up to it right now. Colvin has played in 93 games in AA-Ball for the Cubs this season and he is 86 for 361 (.238 avg, .689 OPS) with 48 runs scored, 7 homers, 46 RBIs and 6 stolen bases. The Cubs like Colvin’s upside but he’ll need to start showing more to earn a promotion before this year is over.