Jo Adell Gets Robbed

Jo Adell performed a miracle. Let’s turn it into math.
Adell robbed the Mariners of three home runs on Saturday. He got Cal Raleigh in the first inning, Josh Naylor in the eighth, and J.P. Crawford in the ninth. Sports Info Solutions has tracked home run robberies since 2004 and only twice had an outfielder robbed even two home runs in a game — nobody had ever robbed three.
Each catch was crucial. The Angels wound up winning 1-0, with Zach Neto’s leadoff solo shot in the first inning being the only run of the game. That means Adell was thrice the difference in the Angels’ narrow victory.
Win Probability Added doesn’t agree. It suggests Adell overall hurt the Angels’ chances of winning by about 3%. Position players only gain WPA on offense — Adell went 1-for-3 with an irrelevant single — so he didn’t get credit for any of these catches. WPA instead gives all the glory to the pitcher, with the assumption that an out is an out on defense, and the only thing that can be known about an out is who threw the ball (in this case, Jack Kochanowicz, Sam Bachman, and Jordan Romano).
While this assumption makes sense for nearly all plays and scenarios, home run robberies are a bit different. They’re definitive. We know what the outcome was, and we know what the outcome would have been had Adell not intervened.
How much was each catch worth? And how much credit does Adell deserve? Let’s take a look. Read the rest of this entry »






