Agoos. The list of players with 5 MLS Cup wins has since been joined by Todd Dunivant and Landon Donovan, both teammates of Mullan's from San Jose, with Donovan being the only player in MLS history with 6 wins. On April 22, 2011, The Rapids were facing the Seattle Sounders. In the third minute, Mullan had the ball taken off him by Sounders winger Steve Zakuani. Mullan, who felt he had been fouled by Sounders defender Tyson Wahl on the play, got up frustrated and chased Zakuani down. Mullan went in with a hard and reckless tackle, breaking the tibia and fibula in Zakuani's right leg. Mullan was shown a red card, while Zakuani was stretchered off and was rushed to the hospital. After the game Mullan was quoted as saying "I'm sorry for Steve. It was never my intention to injure him in the least. It was a tackle that I've done hundreds of times, and I'd probably do it again." Seattle coach Sigi Schmid, who had coached Mullan with the Los Angeles Galaxy, defended Mullan in the post game interview, saying the injury was never Mullan's intent. Mullan issued a formal apology on April 27, saying "It is with regret that my tackle resulted in the injury of Steve and I am deeply sorry to Steve and all those impacted by his injury." Mullan took time off of practice and sought counselling over the incident. On April 28, it was announced that Mullan would be given a 9-game suspension, on top of the automatic one-game suspension for the red card, as well as a fine. The 10-game suspension is the longest in league history for an on-field tackle, however some fans and media felt the suspension was too short. The Rapids originally wanted to appeal the suspension, but Mullan refused to appeal. He returned from the suspension on June 26, playing 67 minutes in a 4–1 loss to the Columbus Crew. On August 5, Mullan scored his first goal for the Rapids, helping them to a 2–0 win against Columbus. Mullan made 22 appearances and had 1 goal and assist during the regular season, helping Colorado qualify for the playoffs. In the first round of the playoffs, Mullan had an assist to give the Rapids a 1–0 win over Columbus. Mullan played every minute of the conference semifinals against Sporting Kansas City, but SKC won each leg 2–0.