The moves were announced Monday before Minnesota concluded a four-game series at Camden Yards. The players were expected to join the team Tuesday, when the Twins host the Chicago White Sox.
Minnesota also selected the contracts of right-handers Lester Oliveros and A.J. Achter, along with infielder Doug Bernier.
The Twins had been playing with just three position players on the bench.
Manager Ron Gardehire said: ''We need some bodies. This will be huge to get a bunch of fresh people in here.''