Weeks was hitting just .162 with 76 strikeouts in 60 games prior to Saturday's game, which he started at second base for the Brewers. He went 0-for-3 as Milwaukee's designated hitter in the series opener against the Twins on Friday.
Though Weeks may not appear visibly shaken by his struggles, Roenicke said it's simply a reflection of the 29-year-old's professionalism.
"It bothers him," Roenicke said. "It bothers everybody. He's just a grinder. He's very professional about what he does. He tries to go through the same routines. He's just not an emotional guy like you can read on so many different faces."
Weeks is only a season removed from his first All-Star campaign, when he hit .269 with 20 homers, 26 doubles and 49 RBIs in only 118 games. Despite this year's difficulties, he's still drawing his share of walks. Weeks entered Saturday's game with a .302 on-base percentage, nearly double his batting average.
"But it has to bother people," Roenicke said. "You can't just go through things, as good as a player as he was -- an All-Star last year -- and have him play like this and say everything's fine. He knows where he is and what's going on. He's working his tail off trying to get back to it."