New gig: Allen was hired as the Raiders’ head coach Tuesday night.
Previous job: He was the defensive coordinator in Denver for the past season.
Age: 39. Allen will be the NFL's youngest active head coach — six months younger than Pittsburgh’s Mike Tomlin.
Coaching history: From 2002-10, he was an assistant in Atlanta and New Orleans.
Playing history: He was a standout safety at Texas A&M and earned an invitation to Buffalo’s training camp in 1996.
Known for: He is an aggressive, smart coach who has seen several players develop under his guidance.
Did you know? New England coach Bill Belichick is the only other active NFL coach who was hired directly from a division rival. He was with the Jets prior to joining the Patriots in 2000.