Also, I'm old enough to remember the knock on Manning being that his arm strength might top out at 60 yards (as opposed to the clearly better prospect in Ryan Leaf)
Chad Kelly is on video throwing it 76 yards. Feleipe Franks threw it 76 yards in competition. Cardale Jones is on film winning a similar competition at 74 yards. And let's not forget Joe Milton who can get 80+.
And not sure how far he can throw it, but Paxton Lynch blew all the records away for measured speed so he probably has the biggest arm.
Take it from me, you'll be seeing all these guys (Russell, Kelly, Franks, Jones, Milton, Lynch) as the future of the position and tearing up the NFL any day now.