[1Old Pro]

Diab told TMZ. “It’s all up to the teams if they’ll let him play.”

They don't just let people play in the NFL who want to play. You need some talent.

[Dr. Sivana]

You need some talent.

He had "some" talent. Mainly as a QB with a strong arm and very good running ability. Those guys have a shorter shelf life, as the legs are aged out. The pure pocket passers last longer (Brady, Flacco, Rogers, Stafford).