Pina was expected back in uniform for the team as early as Tuesday night, but the Brewers called up another catcher, Josmil Pinto, in case family matters prompted a longer absence. It was unclear when Braun would be back.
"We're on Day 1, so we'll kind of wait and see," manager Craig Counsell said.
With the addition of Pinto, the Brewers' 40-man roster was full. A 27-year-old claimed off waivers from the Padres in December and subsequently removed from Milwaukee's roster, Pinto hit .308/.362/.517 in 82 games for Triple-A Colorado Springs. He played in the big leagues for the Twins in 2013 and '14.