Gerut traveled with the team to Milwaukee for a four-game set that began Thursday night but was out of the lineup for a seventh straight game with a sprained ligament in his left middle finger.
Reineke took a much shorter trip than his teammates. He went from Los Angeles back to San Diego for an MRI on his pitching arm for shoulder discomfort. The results haven't come back yet.
"Just weakness in the shoulder," Padres manager Bud Black said before the series opener at Miller Park. "He sort of felt it coming on."
Reineke made his Major League debut on Aug. 16 and has gone 2-1 with a 5.00 ERA in four appearances, three of them starts. Like many young pitchers, Reineke, 26, tried to pitch through the pain at first, but it didn't go away.
Gerut's injury isn't subsiding, either. The center fielder suffered a sprained ligament in his finger while attempting a stolen base Aug. 27 vs. Arizona. Black admitted that the sprain has turned out to be worse than originally thought.
"It's like any sprain," Black said. "There are different degrees of sprains. [Catcher Josh Bard's ankle] sprain took two months, or longer. Some guys, you sprain, you're back in a couple days. That's a wide range, obviously, from two days to two months."
Gerut hasn't been ruled out for the rest of the Brewers series. Black expects him back by the start of a four-game set with San Francisco next Thursday. Gerut hit .322 with seven homers and 19 RBIs in August before getting sidelined.
Will Venable started his sixth game in place of Gerut in center on Thursday.
Nick Zaccardi is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.