After three seasons with the Argonauts, Barker left to join the Birmingham Thunderbolts in the XFL. A fan favorite of the Bolts' (generally small) crowds, Barker was the team's second-string quarterback and played several games in the middle of the season before suffering a career-ending concussion late. In contrast to his college career, his time in the XFL saw him oversee the beginning of a seven-game losing streak.
Barker is currently an analyst for ESPN Radio, and formerly an on-air personality for WJOX in Birmingham. Both he and Al Del Greco, a former Auburnplacekicker, hosted the Opening Drive program on WJOX, along with Tony Kurre until 2018.
From 1995 to 2007 he was married to Amy DiGiovanna. The couple has four children: Andrew (born 1999), Braxton (born 2000), and twins Sarah Ashlee and Harrison (born September 10, 2001).
In 2008, Barker married American country musician Sara Evans. With his four children and Evans' three children, her son Avery Jack (born August 21, 1999) and daughters Olivia Margaret (born January 22, 2003) and Audrey Elizabeth (born October 6, 2004) – he lives in Mountain Brook, Alabama, a suburb of Birmingham.