Wisconsin running back Montee Ball was attacked by five unknown assailants early Wednesday morning.
CBSSports.com has learned that Ball sustained a concussion as a result of the attack.
Additional details of the assault are still sketchy, but according to the police report Ball was attacked by five men while walking down the 500 block of University Avenue. Witnesses say the five men jumped Ball and knocked him to the ground before they began kicking him.
Ball was taken to the hospital where he was treated.
According to coach Bret Bielema he has been released from the hospital.
"My concern right now is for Montee's health and well-being," said Bielema. "Montee has been released from the hospital and is under the care and supervision of our sports medicine staff. We will continue to evaluate him as we approach the start of fall camp this weekend. I do expect Montee to make a full recovery."
Ball was a Heisman Trophy finalist for the Badgers in 2011, finishing the season with 1,923 rushing yards and 39 total touchdowns, leading Wisconsin to a Big Ten title and a Rose Bowl berth.