They were born within nine days of each other, and they died exactly two years and six months apart, Greg in the autumn of 2011 and David in the spring of 2014.
Their paths first crossed as seniors at Birmingham's Woodlawn High School, where, with Greg punting the football and David running with it, the Colonels finished the regular season undefeated and earned a trip to the state playoffs.
In college, they would meet again, this time on opposite sides in the nation's most intense football rivalry
Greg would set school records as a three-year letterman at Alabama, and David would become a ferocious star in the defensive backfield at Auburn.