High praise from Peyton Manning ... the NFL legend says Patrick Mahomes has already done enough in his short career to eventually be inducted into the Hall of Fame.
The former Indianapolis Colts QB seemed to think there wasn't much doubt about it either ... telling TMZ Sports out in Arizona on Friday, "The answer to that question is yes."
The debate is an interesting one ... Mahomes is just 27 years old and has only played for six seasons -- one of which he logged time in just one game.