Dwayne Haskins needs to go back to the bench, now ... 'cause Redskins legend Joe Theismann says the rookie QB ain't ready to face Bill Belichick and the Patriots.
The 22 year old rookie out of Ohio State -- the 15th pick in this years draft -- was thrown into the Skins-Giants game in the 2nd quarter ... and things didn't exactly go smoothly.
Haskins was 9 for 17 for 107 yards ... and he threw 3 Interceptions. The Redskins lost 24-3.
That was against the mediocre New York Giants .