Patrick Mahomes was getting into the action on Wednesday night as the Royals hosted the Yankees in the ALDS.
The quarterback attended the game with his brother Jackson and was also seen watching the matchup with former Chiefs teammate and Yankees fan Gehrig Dieter, who was decked out in Bronx Bombers gear.
But Mahomes gleefully got in his former teammate's face when the Royals tied the game at 2-2 in the fifth inning.
The passer gave Dieter a friendly bump and screamed in his face.
Dieter, meanwhile, pretended to square up before Mahomes walked in the other direction.
Patrick Mahomes got in Gehrig Dieter's face after the Royals tied the game 2-2
Dieter even pretended to square up to his friend Mahomes as they joked around
Mahomes and his brother Jackson were seen at the Royals-Yankees game on Wednesday
Mahomes, whose father Patrick Sr. was an MLB pitcher, is a part-owner of the Royals.
Dieter, meanwhile, is named after Yankees legend Lou Gehrig.
The 2017 undrafted free agent spent four years with the Chiefs until 2021.
After the Royals gave Mahomes a chance to mock his friend, the Yankees responded in the eighth inning as Giancarlo Stanton hit a go-ahead home run to give New York a 3-2 lead.
The Yankees held onto that slender advantage and Dieter ultimately got the last laugh over Mahomes.
Game 4 - which the Royals need to win to stay alive - is tomorrow night.