Caskey most recently served as a football analyst at LSU. Prior to his time in Baton Rouge, Caskey was the running backs coach for the Detroit Lions for two seasons (2019-20) when he worked with Jaguars Offensive Coordinator Darrell Bevell. During Caskey's time in Detroit in 2019, the Lions had four running backs rush for at least 200 yards, which was the most in the NFL. Before his two-year stint with the Lions, Caskey spent nine seasons with the Cincinnati Bengals in several roles, all on the offensive side of the ball.
Polk originally joined the Jaguars as the special teams assistant earlier this year with nine years of NFL coaching experience and seven years of playing experience. He has coached special teams in the NFL for eight seasons, spending time with the Dallas Cowboys (2019), Tampa Bay Buccaneers (2014-18) and San Diego Chargers (2010-12). After starring at Nebraska, he was selected in the fourth round of the 2001 NFL Draft by San Diego and spent six seasons with the Chargers and one with the Cowboys. He appeared in 74 career games with six starts in his NFL career, racking up 121 tackles.