New York Mets pitcher Edwin Díaz was upset when Oakland Athletics reliever Austin Adams used the Mets' popular 'OMG' celebration during a game.
Díaz said Adams' action was inappropriate because the celebration is primarily used by Mets players after scoring home runs.
Adams claimed his celebration was unintentional, saying he was surprised and excited after escaping a tough situation.
The rivalry between the two teams is expected to intensify, with both teams likely to seek revenge for any perceived slights during the upcoming games.