The Twins transferred Paddack (forearm) from the 15-day injured list to the 60-day IL on Sunday.
The transaction clears space on the 40-man roster for right-hander Diego Castillo, whose contract was selected from Triple-A St. Paul ahead of Sunday's 4-3 win over the Blue Jays. Paddack was initially placed on the IL on July 20 with a right forearm strain and wasn't counting on returning until late September in a best-case scenario, so the move to the 60-day IL won't affect his recovery timeline. Per MLB.com, Paddack resumed playing catch from 60 feet last week, but he still has several milestones to hit in the rehab process before his return to the active roster can be considered imminent.