Klay Thompson is heating back up with ex-girlfriend Laura Harrier -- as in, the two roasted in the sun at Dodgers Stadium together on Sunday ... months after reportedly breaking up.
The NBA superstar was spotted with the "Spider-Man: Homecoming" actress at the Dodgers game over the weekend ... where they baked in the sun and drank beer while watching L.A. crush the Miami Marlins.
Klay and Laura had reportedly broken up back in April -- and the Golden State Warriors star was spotted out with "Godzilla" actress Eiza Gonzalez.