Last year, Dan Uggla hit .179 and was worth +0.5 WAR, eventually getting left off the Braves playoff roster. He’ll turn 34 next March. He is due $26 million over the next two years. And this winter, the Braves are going to try to convince another organization that he just needs a fresh start in a new location to salvage his career. Take him out of Atlanta, and maybe the bat speed will come back. Maybe he just needs a change of scenery.
In reality, it is much more likely that any observed change of scenery effect is really just positive regression to the mean, since you only really need new “scenery” when you’re coming off a bad year, leaving nowhere to go but up. Players who change teams in these situations likely underperformed in the prior year, leaving plenty of opportunity for improvement after they arrive in their new city.
Of course, it can go deeper than that as well. Sometimes, when going from one team to another, a pitcher or hitter acquires park dimensions that better fit their game or a clubhouse that might better fit their demeanor. Or maybe they’re a pitcher and they move to a better defensive team. Or they finally get platooned in their new city, allowing them to only play when they have the advantage. There are plenty of reasons why a player could be more effective on one team than another.
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