After a racist slur was used on Sunday by a Miami Marlins fan, the Colorado Rockies announced that they are investigating.Microphones from the Bally Sports Florida Telecast caught a fan shouting the N-word several times after Brinson's pitch in the ninth inning of their 13-8 win.The Colorado Rockies were disgusted by the racial slur made by a fan during the ninth inning today's game against the Marlins' Lewis Brinson," the team stated in a post after the game. The Rockies are still investigating the incident, even though the subject was not identified before the game ended."The Rockies are against racism and discrimination and will ban any fan who uses derogatory language from Coors Field."In the final innings, fans began to crowd the lower deck at Coors Field. They were moving closer to a postgame concert as part of Faith Day celebrations.The team officials were unable to brief the ushers in the area where a fan shouted the slur until the concert was over an hour later.Jason Latimer, Marlins spokesperson, told The Associated Press via SMS that neither Lewis nor any other Marlins were present on the field or at the dugout when the shouts were heard."We brought the matter up to the Rockies. Latimer said to The Associated Press that he would not comment on the manner in which the matter is being handled.Tony Clark, the executive director of MLB Players Association, stated in a statement Sunday night that "we must continue to work together for racism to be never tolerated on and off the field."He said, "While many are committed to respecting and equal treatment for all races, the disgusting racial animus shown today shows that there is still much to do."Brinson is currently in his fourth season with Marlins. He was 2-for-4 Sunday with two RBIs and is currently batting.261 for the season.This report was contributed by The Associated Press.