Stefon Diggs was one happy man on Sunday -- he and his team beat the Lions at home ... all while wearing a pair of cleats that the Clown Prince of Gotham would greatly approve of.
The Vikings wide receiver turned heads out at Ford Field, not just because he was playing like a stud -- 7 catches and 142 yards by the end -- but probably more for his footwear ... a pair of custom "Joker" cleats, with Joaquin Phoenix's mug painted on the side.
There was also a recurring theme from the hit movie written in as well .