The Twins have designated catcher Alex Jackson for assignment, per MLB Trade Rumors. The move drops Minnesota's 40-man roster count to 39.
The timing of the designation is tied to Thursday's Field of Dreams Game between the Twins and Phillies. Both teams were permitted to carry a 27th player for the one-day event, similar to doubleheader rules. Jackson, who served as the Twins' third catcher, was removed from the roster following the game.
Designations for assignment typically give teams ten days to trade, release, or place a player on waivers before losing him outright.