Mitch Keller Is Suddenly a Hot Commodity

There’s been a lot of chatter about surplus value around these parts in recent days. As Ben Clemens wrote last week, surplus value informs a large part of a given player’s appeal as a trade target. Count up all the projected WAR remaining on a player’s deal, multiply it by the price of a single win, subtract the remaining cost of the contract, and what’s left over is an estimate of the player’s surplus value. Anything less than zero, and the contract can be considered underwater; if a contract is underwater, a team seeking to offload that player would expect to receive nothing of value in a trade return.
A couple of months back, my assumption was that Mitch Keller’s contract was ever-so-slightly underwater. The right-hander inked a five-year, $77 million extension in February of 2024. His first year on that deal was thoroughly mediocre: He made nearly every start, but posted a so-so 4.25 ERA/4.08 FIP. Over the two years preceding the deal, it was much of the same. His 4.13 ERA between 2022 and 2024 ranked 68th out of 106 pitchers with at least 300 innings pitched; his 3.92 FIP ranked 51st. The strikeout and walk rates were nearly dead-on league average.
Is a roughly 2-WAR starter worth tens of millions of guaranteed dollars? Your mileage may vary. Patrick Corbin went to the Rangers for $1.1 million after posting a 1.8-WAR season last year. Andrew Heaney got two years and $25 million after delivering 2.2 WAR. Nick Pivetta, notably younger than both of those guys but still three years older than Keller, signed with the Padres for four years and $55 million. If Keller had hit the open market after the 2024 season, when he put up 2.2 WAR in 31 starts (178 innings), I’d imagine he would have received a contract similar to what Pivetta earned after his 2.0 WAR and 145 2/3 innings. Perhaps Keller’s deal wasn’t terrible, but it also wasn’t something teams would be dying to get on their books.
But now it’s the peak of trade deadline season, and the 29-year-old Keller is a hot commodity. The Pittsburgh Post-Gazette reported last Tuesday that the Blue Jays are in on Keller. That’s in addition to reported interest from the Cubs, Mets and Yankees. Nearly half of the most serious World Series contenders are in on the Keller sweepstakes, suggesting that contract is now perceived as having surplus value. Perhaps this has something to do with the haggard state of these teams’ rotations, but I’m inclined to believe that isn’t the entire reason. Read the rest of this entry »








