The Marlins will call up catching prospect J.T. Realmuto , CBSSports.com Baseball Insider Jon Heyman reports.
Realmuto will take over backup-catcher duties from Jeff Mathis, who suffered a fractured finger Sunday. Realmuto got his first taste of major-league action last season, hitting .241/.267/.345 with nine RBI in 29 at-bats. He's 5 for 13 with a stolen base in three games with Triple-A New Orleans.