The Gay Men's Chorus called for an investigation into why its members were not allowed to sing the anthem at Saturday night's Dodgers-Padres game.
The chorus was set to sing the national anthem when the control room played a recorded version of a woman singing. Instead of being allowed to sing the anthem after the recording finished, the chorus was escorted off the field.
The group said that no attempt was made to stop the recording and that the group received "homophobic taunts" while being escorted off the field.
Bob Lehman, the executive director of the chorus, issued a long statement on the group's Facebook page.
The Padres apologized via Twitter Saturday night and by Sunday evening announced they had terminated their relationship with the third-party contractor responsible for the error.
"We once again sincerely apologize to members of the San Diego Gay Men's chorus, their families and those who came out to support their Pride Night performance," the statement said. "The Padres organization is proud of our longstanding commitment to inclusion -- within both our sport and our community. We deeply regret that a mistake on our part has called this into question, but accept full responsibility."