Gray earned a 2011 USA Today High School All-American nomination, and was also named Gatorade National Player of the Year.
[4][5] As a junior, he rushed for 323 yards and eight touchdowns in the Texas Class 4A Division II championship game against La Marque High School on December 17 at Cowboys Stadium, which gave him a total of 59 rushing touchdowns for the 2010 high school football season and surpassed Kenneth Hall's single-season record of 57 set in 1953.
As a junior in 2009, he won the 100 meters at the 4th Johnny Perkins Pirate Relays, with a career-best time of 10.58 seconds.
[13][14] In 2017, after demonstrating a 4.5-second 40-yard dash and a 36-inch vertical leap at the annual Texas Pro Day workout, Gray landed a tryout with the New York Giants.
[18] Following his one season in the IFL, he retired as a player and became an assistant coach for his alma mater Aledo High School.