After throwing at him earlier in the game, Yordano Ventura plunked Manny Machado in the fifth inning, prompting Machado to quickly remove his helmet, limp to the mound, and light into Ventura. It looks like he landed a decent string of punches before he got pulled off the Royals pitcher.
Here’s another, longer video of the brawl.
They did some sniping at each other after Ventura got Machado to fly out in the second inning.
Nobody else was involved in the scuffle, and Machado got ejected.
The Orioles apparently got nice and motivated after the scuffle and immediately hit back-to-back dingers.