you can see when the tendon separation happen - he takes a little longer step back and there it went. he didn't realize it until a second or two later when the pain hit him and he realized he couldn't walk. It was very much like Beckham's.
obviously the wear and tear had been building and that final back step was the stretch that broke the tendon.
Absolute guarantee-and no one is seeing this-Persa is done- he will NEVER be the same mobile athlete even with the best medical care-this is a carreer altering (if not ending) injury-he would have better off breaking his ankle-bone heals, tendons scar and never get back to 100%-his only hope is to become a pocket passer. QB's who run and expose themselves (eg Austin Arnaud) are practicing risky behavior. At least he is getting a degree from Northwestern! He's done with football.
Persa will be back. But he won't be the same mobile threat, not even close. His arm is more than good enough for him to still be a good QB without being able to shred defenses with his feet.