David Blough (rhymes with “plow” in case you are wondering) was not selected in the 2019 NFL Draft and has been signed as an undrafted free agent by the Cleveland Browns. The odds are against him ever throwing a pass in an NFL game. But sometimes grit, determination, moxie and brains can overcome the odds.
First of all, Blough has not been signed to compete against Baker Mayfield. But you still need to have at least one backup on the 53-man roster, a third quarterback who could be the 53rd player or perhaps make it as a player on the practice squad.