Tim Tebow is as serious as ever about making an NFL comeback. Case and point, the now out-of-work, three-year veteran quarterback was recently in Nashville for a few days and wanted to have a workout but had no receivers to throw to. Within minutes, some of Tebow's people were calling some of Bill Back's people and before you know it the coach of the Nashville Venom Indoor Football League team had at least four of his receivers on the practice field and ready to run routes for the former Florida Heisman Trophy winner.