Just in time for the return of football, Under Armour is debuting a new and unique campaign featuring the unlikely combination of Pharrell and NFL champ Ray Lewis. The highlight of the project is the “Natural Born Hitters” mixtape, inspired by the Under Armour film “Ready for August,” featuring Lewis’ inspirational words to a group of young footballers. UA has also announced a contest in which fans are invited to submit their own remix of Pharrell’s new track “Practice,” with the winning submission appearing in an Under Armour commercial to be broadcast during Monday Night Football on September 23. Check out the mixtape and a video interview with Pharrell and Ray Lewis below, and go here for full contest details.