AMA Motocross Championship
Alessi quickly established himself as the second fastest racer behind James Stewart, Jr. during the initial rounds of the 2008 AMA Motocross Championship. However, Alessi suffered a severe crash at Red Bud Raceway on July 6, 2008 during the second moto. The crash resulted in Alessi breaking both shoulder blades and a rib, bruising a lung, and suffering a severe concussion. He sat out the remainder of the season and finished tenth overall in the championship.