Darren Yamashita-USA TODAY Sports

Oakland Athletics play-by-play announcer Glen Kuiper was suspended indefinitely on Saturday, one day after using a racial slur during Friday's broadcast of a game between the A's and Kansas City Royals.

Kuiper used the N-word when discussing the Negro Leagues Baseball Museum in Kansas City.

Kuiper apologized Saturday through NBC Sports California, the entity that suspended him and said it will continue to review the incident.

"I could not be more sorry and horrified by what I said," Kuiper said in a statement. "I hope you will accept my sincerest apologies."

On Friday, Kuiper was speaking pregame on NBC Sports California, and referring to the Negro Leagues Baseball Museum when he appeared to say, "We had a phenomenal day today. (N-word) League Museum and Arthur Bryant's Barbeque."

Prior to the sixth inning, Kuiper said, "A little earlier in the show, I said something, didn't come out quite the way I wanted it to. And I just wanted to apologize if it sounded different than I meant it to be said. And like I said, I just wanted to apologize for that."

The A's issued a statement on Twitter, "The language used by Glen Kuiper during today's pregame broadcast is unacceptable. The Oakland Athletics do not condone such language. We are working to address the situation."

Bob Kendrick, the president of the Negro Leagues Baseball Museum, released a statement Saturday in support of Kuiper.

"I'm aware of the unfortunate slur made by Glen Kuiper," Kendrick said. "I welcomed Glen to the NLBM yesterday and know he was genuinely excited to be here. The word is painful and has no place in our society. And while I don't pretend to know Glen's heart I do know that my heart is one of forgiveness. I hope all of you will find it in yourselves to do the same!"

Kuiper, 59, has been an announcer on A's games since 2004. His older brother, Duane, is a longtime San Francisco Giants announcer who played 12 seasons as a major league infielder.

More must-reads:

TODAY'S BEST
Watch: Oilers chase goaltender Sergei Bobrovsky from Game 4
Dodgers ace leaves game against Royals due to triceps tightness
Pirates place young catcher on concussion IL
Watch: Game 4 of Stanley Cup Final gets off to chaotic start
Rockies 1B, former NL MVP diagnosed with internal oblique strain
NBA insider shares update on J.J. Redick's candidacy for Lakers HC job
Sam Mayer uses overtime restart to win Xfinity Series' return to Iowa
Nationals hurler DJ Herz makes impressive history in third career start
Free-agent DB Stephon Gilmore addresses playing futureĀ 
Report: Oilers open extension negotiations with veteran winger
Tiger Woods makes big admission about his U.S. Open future
Cubs P 'Mike' Imanaga continues hot start vs. Cardinals
Ravens All-Pro safety undergoes minor surgery
Kyle Larson takes pole for inaugural Cup Series race at Iowa
Maple Leafs make major change to coaching staff
Nationals sign OF/DH to minor league contract a day after release
Cubs place lefty starter on 15-day IL
Celtics' All-Defensive guard reportedly could replace Kawhi Leonard on Team USA
Tee Higgins' contract decision adds pressure on Bengals in 2024
Phillies get veteran OF back from IL