But it's some balls you might not expect that the Twins hope give them an edge this spring.
Pitcher Kyle Gibson has been using a specially weighted inflatable ball during his throwing program. The veteran right-hander started using it during his time with strength coach Randy Sullivan at the Florida Baseball Ranch in Plant City this winter. The "connection" ball, about the size of a beach ball, is held between the forearm and bicep of his throwing arm during drills to promote a more controlled delivery all the way through each pitch.
"I'm trying to clean up my arm motion a little bit and hopefully make it more efficient," Gibson said. "It puts less stress on my arm. Less stress on my back."
Another type of ball you don't usually see around camps is a racquetball, which Twins strength and conditioning coach Perry Castellano uses in one of his agility drills. During the drill, which is designed to increase agility and footwork, players have to track down a rapid-fire succession of bouncing racquetballs that are thrown in random directions, forcing players to rapidly change directions.
"That one wears you out," outfielder Byron Buxton said, after completing his turn with the drill on Monday.
J. Scott Butherus is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.