Myles David Jack (born September 3, 1995) is an American football linebacker and running back for the UCLA Bruins. In his first season, he was named the top freshman player in the Pacific-12, receiving honors both on defense as well as offense. As a sophomore in 2014, he was named an All-Pac-12 linebacker for the second straight season.
Jack attended Bellevue High School in Bellevue, Washington, where he was a letterman in football and track. In football, he played running back and linebacker. As a senior he had 98 tackles and 24 sacks, leading his team to a 14-0 record.
He was also on the track & field team. He earned a fourth-place finish in the 400-meter dash at the 2013 WA 3A State Meet, recording a personal-best time of 49.05 seconds. At the 2013 3A KingCo Championships, he took bronze in the 200-meter dash event by clocking a personal-best time of 22.12 seconds. He was also a member of the 2013 state 3A champion 4x100m (41.64) and 4x400m (3:20.12) relay teams.