Here's the current American League Pitching Stats:
http://www.baseball-reference.com/le...-leaders.shtml
No Royals starting pitcher shows up in any of the top ten of favorable stats. And for the staff in general, we have two guys -Crow and Mijeras- tied for appearances at 11.
Chen is tied for second in the AL with losses at 3, tied for second in starts at 5, and is tied for fourth in wild pitches at 2. Those are the only stats where he shows up.
Royals pitching staff is very impressive when you look at the list of wild pitches, and batters hit by pitch. We're very good at those two categories. We throw lots of wild pitches (we miss Perez) and we hit a lot of guys.
In wins, saves, ERA, strikeouts per 9 innings, innings pitched, not so much.