Post-Trade Deadline Pitch Mix Changes: Starters

Every year, a huge throng of pitchers changes teams at the trade deadline. It happens for obvious reasons: teams with postseason aspirations and second-division pitching staffs try to augment their squad, juggernauts shore up their bullpen, or any of several variations on those themes. For the most part, it’s a simple re-allocation of good pitching: teams that don’t need it this year trade pitchers to teams that do, and reap prospects or otherwise interesting players in return.
Sometimes, though, teams make trades for a slightly different reason. Pitchers aren’t static; you can’t call someone up on the phone and trade for a 3.40 ERA, or 2.4 WAR per 200 innings pitched, or anything of the sort. You trade for a pitcher, and as we detail frequently in the electronic pages of FanGraphs, pitchers change the way they approach their craft all the time. They might take a new approach, or learn a new pitch, or switch roles. Learning a new pitch isn’t practical in the heat of a playoff chase, but changing the allocation of existing pitches is far easier. Let’s take a look at two starting pitchers who have changed their pitch mix significantly since being traded at the deadline, as well as two others who have made smaller changes. Read the rest of this entry »









