Fielding Independent Pitching (FIP) measures what a player’s ERA should have looked like over a given time period, assuming that performance on balls in play and timing were league average. Fangraphs relies on FIP to calculate WAR for pitchers.
Is FIP independent of the catcher?
The following table shows pitching performance by catcher over the last two seasons.
Two topics that appeared in the forums led me to wonder which teams are getting the platoon advantage.
How did the Indians do it? I look at their numbers and see a combined 6.1 WAR from Jan Gomes and Ryan Raburn. Those cheap additions will be the difference between contending for the wild card and being on the fringe. Francona has found a role for them to put up fantastic numbers.
We also debated about how platooning might help the Twins.
I wondered how often
My last blog topic on catcher defense was last November. The trade of Butera has prompted a revisit.
Through July 26 while Ryan Doumit was catching, 46 out of zone balls were called strikes and 205 in zone strikes were called balls. They convert it to a ratio which for Doumit would be 0.22 extra strikes/lost strikes. That ratio is the worst in baseball and the next for a current catcher is twice the ratio at 0.44. The data is from Baseball Prospectus.
How much difference
I have a little different format for this one as much has been written about Perkins. Dave Schoenfield's article recommending the Twins trade Glen Perkins in "Another Reason Closers are Overated".
As I read his article is whether he was asking the right questions. The question should really be what happens to closers the following year. It should be how many teams have the same closer. How effective can we expect Perkins to remain in the next 2-3 years?
The Twins signed to veteran back of the rotation starters last winter. Is it possible they might flip them in a midseason trade?
Kevin Correia whose best skill might be his reliable health has performed at an ERA+ of 99 (essentially league average) this year. Mike Pelfrey is coming off injury and started poorly. He needs to put up a string of good starts in order to show that he is healthy. Neither player has a contract that is going to scare off a team.
Earlier I look