Rob Gronkowski and Tom Brady are back together -- at least they were on Monday -- with Gronk telling TMZ Sports the two worked out together at UCLA!
"It was great working out," a slimmed-down Gronk told us at his $50k Charity Challenge basketball game at Pauley Pavilion.
"Tom needs someone to throw to so, you know, he calls Mr. Reliable Robbie G the one and only!"
Rob ran routes and caught passes from TB12 at the field at UCLA, where Tom usually works out while in L.