In 2007, Harrell was voted Second Team All-Arena after recording 132 receptions for 1,547 yards and 47 touchdowns in 16 games. He finished the season tied for fourth in the league in receptions, fourth in scoring (282 points) and seventh in receiving yards. He was named Offensive Player of the Game for the third time, against the Gladiators after recording nine receptions for 91 yards and four touchdowns. He had 10 receptions for 159 yards and a season-high six touchdowns on the road against the Chicago Rush. He recorded a season-high 14 receptions for a season-high 181 yards and three touchdowns on the road against the Philadelphia Soul. He was then named Offensive Player of the Game after recording 10 receptions for 154 yards and four touchdowns against the Rattlers. Harrell was named Offensive Player of the Game after recording eight receptions for 95 yards and three touchdowns in a season-opening loss to the Grand Rapids Rampage.