|Chen pitching for the Chunichi Dragons in 2011|
Chen's past 4 seasons give an idea of his ability to limit baserunners, posting a WHIP of 1.063 over that time. For comparison, a 1.063 WHIP landed Doug Fister 10th in MLB last season (granted, NPB is not the same level of competition). Additionally, over those 4 seasons, Chen pitched to a 2.48 ERA, comparable to Daisuke Matsuzaka, and only half a run worse than Yu Darvish.
It was kind of surprising that interest in Chen was limited compared to past NPB free agents. After all, he's 26, left-handed and has the potential to throw a mid 90s fastball. Regardless, the O's jumped on the opportunity, so their gain.
I'm going to take a stab at projecting Chen's production in the MLB this year. Take it with a grain of salt or two, as I have never seen Chen pitch in person, nor am I certain he will regain his velocity. That said: