Jeffers' contract was purchased by the Twins on Thursday, Brandon Warne of ZoneCoverage.com reports.
The Twins were in need of catching depth after Mitch Garver (side) was placed on the 10-day injured list Thursday. Jeffers will start Thursday's contest against the Brewers and bat ninth as he'll make his major-league debut. While Alex Avila should have the slight edge for playing time while Garver is sidelined, Jeffers could see a fair amount of time behind the plate in the coming days.