Giants outfielder Joc Pederson said Reds outfielder Tommy Pham slapped him before Friday's series opener over a dispute about their fantasy football league.

While the Giants warmed up in the outfield, Pham confronted Pederson and smacked him in the cheek before the pair was separated.

"It was a surprise," Pederson told reporters. "There was no real argument. He kind of came up and said, 'Like, I don't know if you remember from last year.' And I was like, 'Fantasy football.' He was like, 'Yeah.'"