And, if you're Alex Rodriguez and Jennifer Lopez, ya don't buy a pro baseball team without checking out the stadium!

That's what J-Rod did on Wednesday -- getting a VIP tour of Citi Field in Queens as part of their plan to buy the team.

J Lo -- sporting a flowing white sundress -- led the charge with A-Rod and a few other businessy-lookin' dudes.

As we previously reported, the power couple has been gunning to buy the team for months -- and recently linked up with some rich partners to add to their ownership group.

The most recent addition to Alex and Jen's team is Mike Repole -- who co-founded BodyArmor and Vitaminwater. He's rich and also a life-long Mets fan.

They had previously brought on a dream team of current and former NFL ballers including Travis Kelce, Brian Urlacher, Joe Thomas, and DeMarco Murray.

There are two NBA stars in the group as well -- Washington Wizards beast Bradley Beal and Denver Nuggets center Mason Plumlee.

J Lo and A-Rod had previously tried to buy the Mets for around $1.5 billion -- but it didn't exactly work out since the Wilpon family (which owns the team) was hoping to get around $2.5 billion.

Hedge fund billionaire Steve Cohen was the front-runner to buy the team -- he's loaded and has already made a $2 billion bid, according to the NY Post.

But, ESPN says the Wilpons would prefer to sell to Lopez and Rodriguez if they can come closer to the top bid.