After practicing in a limited fashion for the third day in a row on Friday, Cameron (concussion) was listed as questionable for Sunday's game against the Bills, ESPN.com reports. Cameron, who has missed four straight games after suffering a concussion on Oct. 26, is thus trending in a positive direction, but he's not a lock to return to action this weekend, based on coach Mike Pettine's comments Friday. "Just see where he is tomorrow," Pettine noted Friday. "We say 'day to day.' It's truly day to day. He practiced all three days this week. He didn't take a full slate. He's truly limited. So, we'll see." In any case, the Browns kick off this weekend at 1:00 E.T., so those considering the tight end in Week 13 will have his playing status confirmed prior to the first wave of kickoffs on Sunday.