"I think you can say that [Eagles have QB advantage], but Mahomes, he been playing, even with his ankle sprain, he's still great!" Watters told Babcock on the "TMZ Sports" TV show (airs weeknights on FS1).

"That's what's so crazy about him. He's such a great quarterback and I think he will feel better because he will have some time to heal up and I'm sure they're gonna be working that ankle over and over all the way up to game time."

Of course, the 27-year-old Super Bowl champ was injured during the Divisional round game against the Jaguars ... still managing to throw for 326 yards and 2 touchdowns against the Bengals. Mahomes also ran critical yards in the waning moments of the game, setting up the game-winning field goal.

Speaking of the injury, Ricky says he's beyond impressed with Mahomes' toughness ... but at the end of the day, the 5x Pro Bowler played with the Eagles, so there's no question about who he's rooting for come Super Sunday.

"That's the worst ankle sprain you can have is a high ankle sprain so for [Mahomes] to do what he's doing, he's a warrior and I love him as well. I really do, so it's really hard to go against him because I love him so much, I love watching him play but you know, I gotta go with my Eagles. You know I gotta see the Eagles fly, baby."

As for Jalen Hurts, Watters is blown away by how well he's played this season.

"[Jalen] does not look like a 24-year-old, that's for sure. He looks like a well-seasoned veteran," Ricky told us ... before explaining why Hurts is so damn hard to contain.

Watters won a Super Bowl in 1995 ... so he knows what it takes to win the big game. We asked him what advice he'd give to the Philly players.