Former NFL quarterback Ryan Leaf said Thursday he could face radiation treatments if the part of a brain tumor that couldn't be removed by doctors winds up getting bigger. Leaf told The Associated Press that the California doctor who performed the surgery couldn't get all of the tumor because parts were wrapped around brain stem nerves that affect swallowing and shoulder movement. "We're going to monitor it and if it starts to grow again then we're going to have to do a six-week round of radiation," Leaf said in a phone interview from California. Before the tumor was discovered, Leaf says he was upset because he was "dead sober" but still felt like he was "hung over all the time." The 35-year-old Leaf was addicted to painkillers a few years ago. He'd run a few miles or work out and feel better, the result he said he believes was from increased oxygen in his blood. A short time later, he'd "just hit a wall again." He never thought his hydrocodone abuse caused the tumor and he said his doctors agreed.