Spring training or not, Madison Bumgarner is a fiery competitor on the mound.

Jason Heyward found that out first-hand on Thursday as he and Bumgarner got into it in the fourth inning of the Giants-Cubs matchup. Bumgarner struck Heyward out looking, which led to this heated exchange:

According to SFGate, Bumgarner thinks Heyward was relaying signs to teammate Dexter Fowler who was standing on second base at the time. “They might want to be a little more discreet about that if you’re going to do that kind of thing,” Bumgarner said.

Heyward denied Bumgarner’s accusation, saying he was looking at Fowler to ask whether he thought the pitch was a ball or strike.

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