Entertainment TV 'Dancing with the Stars' ' Mark Ballas Injured and May Not Be Able to Perform, Says Source "It's an old injury that he aggravated," a source tells PEOPLE of the pro dancer By Patrick Gomez Patrick Gomez Patrick Gomez is the Editor in Chief/General Manager of Entertainment Weekly. Formerly at People magazine and The A.V. Club, the Critics Choice and Television Critics Association member has appeared on 'Today,' 'Extra!,' 'Access Hollywood,' 'E! News,' 'CNN,' and 'Nightline,' and can be seen frequently on 'Good Morning America.' Follow the Texas Native at @PatrickGomezLA wherever your media is social for all things 'For All Mankind' 'Top Chef,' and puppy related. People Editorial Guidelines Published on March 28, 2016 12:15 PM Share Tweet Pin Email Photo: ABC/Craig Sjodin Mark Ballas may not be able to hit the dance floor on Monday’s episode of Dancing with the Stars. “He injured his back at camera blocking rehearsal on Sunday,” a source tells PEOPLE of the newly engaged pro dancer. “It’s an old injury that he aggravated. It’s up in the air if he’ll be able to perform tonight.” Just two weeks into the competition, this is not the first injury of season 22 – deaf model Nyle DiMarco had to get stitches after an accident during the first week of rehearsal. Ballas’ fate in the competition will be decided by a doctor later today. But until he is cleared by the medical team, Ballas’ partner, UFC fighter Paige VanZant, is rehearsing with Alan Bersten, a former So You Think You Can Dance contestant and current member of the DWTS dance troupe. “Mark has been so supportive and just a lot of fun to work with,” VanZant told PEOPLE after last Monday’s DWTS premiere. “I don’t know how I’d do this without him.” Dancing with the Stars airs Mondays (8 p.m. ET) on ABC.