In 2005, Harrell was named AFL Offensive Player of the Year and First Team All-Arena after recording 122 receptions for 1,486 yards and 41 touchdowns and helping lead Colorado to the ArenaBowl XIX championship. He recorded eight receptions for 122 yards and two touchdowns in the ArenaBowl win over the Force. He recorded a season-high 13 receptions for 130 yards and four touchdowns on the road against the New Orleans VooDoo. He was named Offensive Player of the Game against the Los Angeles Avengers after recording 10 receptions for 135 yards and five touchdowns. He was also named Offensive Player of the Game three other times during the season, on the road against the Arizona Rattlers, against the Gladiators and against the Nashville Kats.