During Wednesday's game between the San Diego Loyal SC and Phoenix Rising FC, the Loyal walked off the pitch in protest after a Rising player allegedly directed an anti-LGBTQ slur at San Diego midfielder Collin Martin.
Martin, 26, came out as gay in 2018 while playing for the Minnesota Timber of the MLS, making him at the time the only out active athlete in all men's major league sports in the U.S.
Last week, San Diego forfeited a match in protest after an opposing player from the Los Angeles Galaxy II used the n-word toward a Loyal player.