Your starting quarterback is going to get most of the first team practice reps, but you’ll get a chance to evaluate backups via preseason games. The quarterbacks on this list aren't just fighting for the starting job, they're also fighting for a backup job. Michael Penix Jr., Atlanta FalconsThe Atlanta Falcons have already brought in a potential replacement for Michael Penix Jr. in Tua Tagovailoa. He's probably going to be forced to retire after this year because his return to the NFL has been miserable. If Lock loses out to Milroe, he's NFL days could very well be numbered.