MLB Mailbag: Williams, Trade Deadline, Valdez, Keith, Red Sox, Muncy, Jays’ Outfield

It’s time for another installment of our weekly MLB Mailbag. I’m pinch-hitting for Tim Dierkes once more this week before he takes back over next week. In today’s mailbag, we’ll look at Devin Williams‘ signature changeup, a group of potential first base targets on the trade market and what they might cost, Framber Valdez‘s earning power, Colt Keith‘s role in Detroit, the Red Sox’ struggles and Rafael Devers‘ future, the Dodgers’ third base outlook and Toronto’s collection of outfielders. Let’s dive in.

Elden asks:

I admittedly never followed Devin Williams before the NYY acquired him but isn’t it odd to have a closer so heavily reliant on changeups? What is the current timeline to get Weaver back?

It’s odd, yes, but when said changeup is arguably the best pitch in baseball since Williams’ debut, it’s hard to argue with the approach. First, let’s look at historical changeup usage by Williams.

Sports Info Solutions began tracking pitch types back in 2002. Since the 2002 season, there have been 6500 individual seasons by relievers with more than 20 innings thrown. Only 20 of them have seen a reliever deploy his changeup at a 50% clip or higher. Williams has five of those. Tommy Kahnle has four of them.

Williams isn’t the only reliever to make a career out of a lethal changeup, of course. Trevor Hoffman rode his changeup to the Hall of Fame. Francisco Rodriguez and Fernando Rodney had dominant changeups at their peaks. None threw their changeup even close to as frequently as Williams, however. Broadly speaking, yes, it’s quite rare for relievers to be this reliant on changeups. It’s rare for relievers to even have a changeup as their go-to secondary offering; fastball/slider combos have been en vogue for years and remain so.

Statcast and its pitch tracking data were rolled out in all 30 MLB parks back in 2015. Since 2015, Williams’ “Airbender” unsurprisingly grades out as the best changeup in the sport, but it’s also the eighth-most valuable pitch overall. The only individual pitches that carry greater value in that time are (in order): Kenley Jansen‘s cutter, Josh Hader‘s sinker, Chad Green‘s four-seamer (!!), Edwin Diaz‘s slider, Zack Britton‘s sinker, Emmanuel Clase‘s cutter and Liam Hendriks‘ four-seamer. Of course, it bears mentioning that Jansen, Hader, Green, Hendriks and Diaz have all pitched far more in that decade-long window than Williams, who only debuted in 2019.