Underrated: Scott Olsen
23-year-old Marlins pitcher Scott Olsen has had a long string of incidents during his short MLB career, including fights with teammates, making obscene gestures to fans, DUI, resisting arrest and fleeing & eluding police. Despite all that, he's a very decent pitcher. Last season, as a rookie, he went 12-10 with a 4.04 ERA, 8.27 K's/9 IP & 3.74 BB/9 IP. His 166 K's that year gave him the Marlins' record for most K's by a rookie. This season though, he's been pitching below his potential, going 8-7 with a 4.99 ERA so far.
As a result of his drop in performance, Olsen hasn't received much hobby interest this season, so his RC cards are pretty affordable. You can find his 04 Bowman Sterling Auto/Jsy (the only Auto RC of his that I've seen) for around $10-15 TAC.
Just like Scott Kazmir & Dontrelle Willis, I believe that this young pitcher is just temporarily off his game, and should rebound sooner or later. Did I also mention that he's also a decent hitter (.242 BA through 7/22)? As for his behavioral concerns, hopefully he'll just outgrow them with time.