The A's placed catcher Stephen Vogt on the family medical leave list on Saturday, the team announced.
To replace Vogt, Oakland called up catcher Bruce Maxwell from Triple-A Nashville, and the club also transferred right-hander Fernando Rodriguez (strained right shoulder) to the 60-day disabled list to clear a spot for Maxwell on the 40-man roster.
The 25-year-old Maxwell, a second-round Draft pick by the A's in 2012, has yet to make his Major League debut. Maxwell has hit well at Triple-A this season, posting a .321 batting average with 10 home runs and 41 RBIs in 60 games.