By Daniel Chavkin The Hall of Fame quarterback gave his best guess for the number. For Brett Favre’s entire career, the former quarterback was known for his toughness and playing through pain. And according to him, this happened pretty often. While appearing on The Bubba Army radio show, Favre said he thinks he frequently got concussions and ultimately played through them. “Concussions happen all the time,” Favre said, via TMZ.com. “You get tackled and your head hits the turf, you see flashes of light or ringing in your ears but you’re able to play—that’s a concussion.” Therefore, Favre estima…