Red Sox bring back Wyatt Mills on two-year minor-league deal

The Red Sox brought back injured reliever Wyatt Mills on a minor-league contract last week, per the club’s transactions log. It is a two-year deal that will cover the 2024 and 2025 seasons, according to MassLive.com’s Chris Cotillo.

Mills, who turns 29 in January, was non-tendered by Boston earlier this month after not pitching at all this past season. The right-hander was originally acquired from the Royals for relief prospect Jacob Wallace last December and was expected to compete for a spot in the Sox’ Opening Day bullpen out of spring training.

After allowing just one earned run and striking out 10 over six innings his first four appearances of the spring, Mills was shelled for four runs on four hits, one walk, and two hit batsman in the sixth inning of a 16-3 Grapefruit League loss to the Blue Jays in Dunedin on March 13. He was then shut down to to an elbow issue and opened the season on the injured list.

Despite trying to rehab the injury, Mills ultimately underwent Tommy John surgery in early July. As a result, he will miss most — if not all — of the 2024 season, but the structure of his new contract allows the Red Sox to oversee his rehab and the potential benefits that come with it once he is presumably healthy in 2025.

Mills, a former third-round draft pick of the Mariners out of Gonzaga in 2017, first broke in with Seattle in May 2021 and was then traded to Kansas City last June. Between the two stops, the Washington state native owns a 6.21 ERA (but much more encouraging 3.84 FIP) with 37 strikeouts to 20 walks in 38 relief appearances (42 innings) at the big-league level.

As MassLive.com’s Christopher Smith noted earlier this summer, the Red Sox were intrigued by Mills because of how his profile mirrors that of fellow side-winder John Schreiber. Like Schreiber, Mills throws from a lower arm angle and operates with a three-pitch mix that consists of a four-seam fastball, a slider, and a sinker. He had also been planning on adding a changeup to his arsenal before going under the knife.

While proceeding with his rehab moving forward, Mills will remain in the Red Sox organization without occupying a spot on the club’s 40-man roster.