Another O’s starter, another match-up I like for the Royals. Wei-Yin Chen seems to throw anything and everything, mixing a four-seamer, two-seamer/sinker, slider, curve, and change from the left side. I can’t even fathom standing in against a two or three pitch major league pitcher, but when you have to be ready for five pitches?

Here is Chen’s selection, velocity, and runs above average on all those pitches in 2014, via Fangraphs:

four-seam fastball: 46%, 92, +4
two-seam fastball/sinker: 19%, 91, 0
slider: 15%, 82, +5
change: 12%, 83, -7
curve: 7%, 74, -3

So he’s had two plus pitches this season, one average, and a couple more that haven’t worked so well aside from giving the hitters more to think about. The Royals have faced him six times over the last three seasons, and have lit him up pretty well, cranking out 47 hits in 36.2 innings, including 14 extra-base hits, five of them homers. Billy, Alex, Hos, and Infante have all taken Chen deep. The Royals starting nine have a combined 117 plate appearances against him with a combined .878 OPS. Most of that damage came in 2012 and 2013 though–KC dropped both games against Chen this season, and failed to take him yard. Chen is quite susceptible to the long ball though, so it’s no surprise Buck Showalter saved him for a game at Kauffman. But it looks to me like most of the homers KC has hit in these playoffs would have left any yard.

Chen doesn’t have a lot of terribly similar comparable counterparts, but I came up with ten lefties* that are sort of in the same galaxy to see how the Yostmen have fared against them (sorted by OPS):

Wow. That’s a lot of dongs. The lefties sans Moose have not been bothered facing these same-side pitchers. Since everything in these playoffs has been backwards, Chen will probably toss a perfect game tonight, but, on screen, it looks like the Royals have another opportunity to jump on an O’s starter.

Here’s what happened the last time Chen started in KC, on May 15 this year:

*Chen, Clayton Richard, Tony Watson, Sam Freeman, Patrick Corbin, Aaron Loup, J.A. Happ, Caleb Thielbar, Wade Miley