Ex-NFL star Robert Griffin III has found his new calling on the gridiron … telling TMZ Sports he has fully caught the flag football bug … and he’s got his eyes on Olympic gold.

The former No. 2 pick in the NFL draft opened up on his new endeavor with Babcock this week … fresh off his workouts with Team USA ahead of the IFAF World Championship in Germany.

The plan?? Dominate in Düsseldorf in August … then go all-in on defending American soil in the 2028 Olympic Games in Los Angeles.

But any NFL star can’t just waltz into the world of flag football without putting in the time … and that was pretty clear with the results of the Fanatics Flag Football Classic.

RG3 broke down the differences between tackle and flag … and explained how the attention to minor detail shines through when both go head-to-head.

That being said, Griffin III made it clear he is going into the experience as humble as can be — he’s hoping to learn from the guys that paved the way and use his talents to HELP them, not take their gigs.