Filming for this was supposed to be starting this week. The female lead for the film is going to be Roselyn Sanchez, and they had picked a little seven year old girl to be his daughter. They had been recruiting extras to play as the fans in the stadium in Boston because Dwayne's character is supposed to be a beloved football superstar. While all this was going on, though, there was a little 'bump' along the way and, unfortunately, Dwayne got injured during a football practice. As the article says, a surgery is scheduled on Friday to repair the damage, and after that filming will resume. Considering that Gridiron Gang comes out this September, however, and that he'll be doing all the press conferences and advertising for the film, filming probably won't start until the fall.
Best wishes, of course, are sent to Dwayne in all this.