Dejection in Denver
Allen will be the first defensive-oriented Raiders coach since John Madden was hired before the 1969 season. Oakland likely wanted a defensive mind after ranking 29th in total defense this season.
In his first season as coordinator in Denver, Allen helped the Broncos improve from allowing an NFL-worst 29.4 points and 390.8 yards per game to rank 20th in yards (357.8) and 24th in points (24.4) this season on the way to an AFC West title.
The Broncos increased their sacks total from 23 to 41 as they were tied for the sixth-most blitzes on pass plays in the league this season, according to STATS LLC.
The Associated Press contributed to this report.