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Giancarlo Stanton is ready for two more superstar teammates ... the Yankees outfielder tells TMZ Sports he wants NYY to sign BOTH Gerrit Cole AND Stephen Strasburg!!

"You can never go wrong with Cole and Strasburg!" Stanton says.

The two stud pitchers are set to be free agents this offseason after epic playoff runs for the Astros and Nats respectively ... and when we got Stanton outside of Il Pastaio, he made his Pinstripes pitch to both guys.

"I'm pretty sure Gerrit grew up a Yankees fan, so he'd always like to do that," Stanton tells us. "And, Stras, we debuted together, so he'd like that!"

As for if there'd be any jealousy in a clubhouse full of superstars adding TWO MORE to the mix ... Stanton says hell no, telling us, "You can never have too many!"

So, could it actually happen? Maybe. Both guys are reportedly in line for some MASSIVE contracts, and everyone knows the Yankees have the cash to bring in big free agents.

By the way, Stanton -- who only played in 18 of 162 regular season games -- also tells us he's ALREADY working to make sure a repeat of his injury-shortened 2019 season doesn't happen again next year.

The 29-year-old slugger says he's trying to start his workouts WAY earlier this offseason ... and showed us he's serious about it -- already decked out in gym attire!