Other - In SB Nation's new series "Core of Sports" sponsored by the United States Marine Corps, we followed UFC fighter Brian Stann as he trained to fight Alessio Sakara in Atlanta after his brother-in-law passed away. Stann won the fight and even called the referee in after knocking out Sakara with short elbows in the first round.A former Marine, Brian has been decorated with the Silver Star -- an award honoring valor in combat.Shot on a RED Epic. Narrated by Eric Thomas.