Bielfeldt suffered the injury during Monday's practice, and it's unknown when he'll be able to return to the court, though the injury is not believed to be serious.
"He ended up spraining his ankle with about a half hour left in practice (Monday), and it's a pretty good sprain," Beilein said after the team's 73-41 win over Western Michigan. "We don't know whether he'll be available Saturday (against) Arkansas.
Bielfeldt, a 6'7 forward from Peoria, Ill., has only averaged 6.2 minutes per game so far in 2012. Bielfeldt is averaging just 1.2 points per game, but has added 2.8 rebounds per game -- not too shabby for playing an average of six minutes a contest.
With just two games in the next nine days, the Wolverines have plenty of time to help Bielfeldt rest and get back to full strength, without risking further injury.
Michigan's next contest is scheduled for Saturday, Dec. 8, when the Wolverines play host to the Arkansas Razorbacks. After that, Michigan will host Binghamton on Dec. 11, before taking on West Virginia on Dec. 15.