McEvoy, a junior college transfer, was treated for two head cuts following the mugging, having his wallet, watch and iPhone stolen.
"First and foremost we are happy that Tanner is physically OK after this attack," Badgers head coach Gary Andersen said in a statement. "It's terrible to get a call about something like this, but we are grateful the injuries were not serious."
According to a police report, McEvoy was in downtown Madison when he was struck in the head in the incident near the intersection of Wisconsin Avenue and East Dayton Street around 1:45 a.m.
Police said witnesses reported seeing two males and two females near the victim at the time of the attack. All fled toward the Capitol Square. The males were described as black, in their late teens, with thin builds and wearing white or gray shirts. No descriptions were provided for the females.
McEvoy was able to resume team activities on Monday, according to a UW release, and should be 100 percent when Wisconsin opens preseason camp on August 5.
Last year, running back Montee Ball suffered a concussion and facial injuries and missed the first week of camp after five men jumped him in the early morning hours, just a few days before the start of camp. Ball was out with friends Downtown when he was jumped, knocked to the ground, and kicked in the head and torso. Three men have been charged and a fourth was recently arrested in connection with the mugging.
McEvoy, from Hillsdale, N.J., arrived in Madison in late May. In his only season in 2012 at Arizona Western College, he threw for 2,264 yards and 32 touchdowns, while rushing for 1,196 yards and 14 touchdowns. McEvoy transferred from South Carolina after his redshirt year.