Oakland Athletics broadcaster Glen Kuiper was fired by NBC Sports California after using a racial slur during a telecast while describing a trip to the Negro Leagues Baseball Museum.

Kuiper was suspended by the network earlier this month after his slur that aired during a pregame segment of an A’s game against the Kansas City Royals on May 5. Kuiper talked about a trip to the museum with colleague Dallas Braden but seemingly mispronounced the word “Negro”, making it sound instead like a slur.

A person familiar with the investigation said “the decision was based on a variety of factors, including information uncovered in the internal review.” The person spoke on condition of anonymity and didn’t divulge specific details because the network had not publicly disclosed the results of the investigation.

Kuiper apologized on the air later in that game without getting into specifics, saying he said something that “didn’t come out quite the way I wanted it to.” He later issued a statement through the network when he was suspended, saying: “I could not be more sorry and horrified by what I said. I hope you will accept my sincerest apologies.”

Kuiper has been calling A’s games in the Bay Area for 20 years. He is the younger brother of former major leaguer and Giants announcer Duane Kuiper.