version of Patrick Mahomes.
https://sports.yahoo.com/todd-mcshay-bryce-young-smaller-183113939.html
Here is Rattler's combine numbers
https://www.nfl.com/prospects/spencer-rattler/32005241-5468-9214-c9ac-83458db99cd0
I'd say his mobility is fairly average. He was a very hyped up player coming out of High School, went to OU to play for the QB whisperer in Lincoln Riley and had one good year in college with the rest being average.
https://www.sports-reference.com/cfb/players/spencer-rattler-1.html
You act like he's some wildly talented diamond in the rough or something. That would be someone like Joe Milton. There's a reason nobody drafted Rattler until the 5th round and there's no shortage of teams who need upgrades at QB.