That's what Jay-Z did on Tuesday night -- flying out to Pittsburgh to watch the Pitt Panthers take on Zion Williamson and Duke at the Petersen Events Center.

For the record, it's not like this was some marquee matchup -- Duke is the #2 team in the country and Pitt isn't ranked.

So, why would Jay -- as busy as he is -- leave Beyonce and the kids to see a college hoops game?

Seems pretty obvious he's making a run at Zion -- like every other major sports agent on the planet.

Zion is expected to be the #1 overall pick in the 2019 NBA Draft -- and it would be a huge score for Roc Nation which already has stars like Kevin Durant, Saquon Barkley and Todd Gurley on the roster.

In typical Zion fashion, he balled out in front of Hov -- dropping 25 points, 7 rebounds and 7 assists in the 79 to 64 victory.

Also, Zion's teammate, R.J. Barrett -- who's also projected to be a Top 3 pick -- did well, posting 26 points, 5 rebounds and 3 assists.

Duke's #3 guy Cam Reddish had a decent stat line -- 15-6-4.

Jay had been planning the trip for weeks, according to Pitt coach Jeff Capel who told reporters, "His people reached out to me a few weeks ago about them wanting to come ... people from Roc Nation."

"Our athletic department and our ticketing people did an amazing job accommodating that. It’s great to have the greatest rapper ever in the arena.”

Guessing Jay can charge this trip to the company account -- like he's always said ... he's a not a businessman, he's a business, man.