The Cubs have landed utilityman Willi Castro from the Twins, according to Jon Heyman of the New York Post. Minnesota will receive multiple prospects in return, and ESPN.com’s Jesse Rogers specifies those players as minor league pitchers Ryan Gallagher and Sam Armstrong.
The switch-hitting Castro can play all over the diamond, but he’ll surely get most of his playing time in Chicago at third base. The Cubs haven’t gotten much from the position all season, even though top prospect Matt Shaw has been on fire since the All-Star break. Shaw could continue to get at-bats as long as he continues to hit, with Castro spelling him on occasion and moving into more of a regular role if Shaw comes back to earth.
Since coming to Minnesota as a free agent in the 2022-23 offseason, Castro has hit .250/.335/.398 over 1388 plate appearances and played at every position on the field except catcher and first base. Beyond just being a plug-and-play fill-in for the Twins’ many injuries over the years, Castro forced his way into more of a regular role with his solid hitting from both sides of the plate, and a 34-steal season in 2023. That havoc on the basepaths may have been a one-year outlier (he is 23-of-35 in steal attempts over the last two seasons), but Castro is nevertheless a solid all-around contributor.
Castro is also inexpensive, as the Cubs will owe him roughly $2MM for the remainder of the 2025 season before the utilityman enters free agency this winter. Between his salary, rental status, and ability to fit into pretty much any roster, Castro drew a lot of buzz as the deadline approached, with such teams as the Astros, Yankees, and Mariners listed as known suitors.
This interest allowed the Twins to land two pitching prospects for a rental player. MLB Pipeline ranks Gallagher as the eighth-best prospect in the Chicago farm system, while Armstrong just barely cracked Baseball America’s preseason Cubs ranking in the 30th spot on the list. This duo will join the haul of young talent Minnesota received as part of their enormous deadline-day selloff.
Gallagher was a sixth-round pick in the 2024 draft, and he has already reached Double-A Knoxville in his first pro season. Gallagher has a 3.43 ERA, 28.2% strikeout rate, and 5.9% walk rate over 84 combined innings at the high-A and Double-A levels, with 11 1/3 of those frames coming in Knoxville. His top two pitches are a changeup and a fastball, with the latter pitch standing out for its “quality induced vertical break and command” (according to Pipeline’s scouting report) moreso than velocity in the 90-93 mph range.
Armstrong was a 13th-round pick for Chicago in 2023, and he has a 4.62 ERA, 19.3% strikeout rate, and 8.3% walk rate in 89 2/3 innings in Knoxville this season. BA’s scouting report says Armstrong has “a kitchen sink’s worth of pitches” but perhaps not a true signature pitch among his six offerings, as his slider gets the highest grade with a relatively modest 50. Armstrong has posted some good grounder rates across his minor league career, but it would seem he might have trouble continually fooling batters without premium stuff.