Oregon defensive coordinator Nick Aliotti will announce his retirement this season after the Ducks face Texas in the Valero Alamo Bowl on Dec. 30.

A source told Bruce Feldman of CBS Sports that the 59-year-old coach plans to announce his retirement after 21 seasons with Oregon.

Oregon football also confirmed the news on Twitter.

Defensive coordinator Nick Aliotti to retire after @valeroalamobowl. Full release to come #GoDucks

— Oregon Football (@WinTheDay) December 27, 2013

In an official release from GoDucks.com Aliotti said, “I’ve been fortunate to enjoy a great career and to step away from the game when I felt the time was right. Now is that time.”

Aliotti has coached for 38 years and worked for one year as the defensive coordinator for UCLA and three years as special teams coach for the St. Louis Rams.

“After coaching for 38 years, it is time for a new chapter in my life and Kathryn’s,” Aliotti said. “Coaching is all I’ve ever known but it has been a labor of love and a fantastic ride,” Aliotti told GoDucks.com.

The first Alamo Bowl press conference is scheduled for 2:30 p.m. Central Time. Aliotti, along with players Derrick Malone, Ifo Ekpre-Olomu, Taylor Hart, Brian Jackson, and Tony Washington, will be present at the press conference.

More to come with Aliotti’s statements from the press conference.

Follow Beth Maiman on Twitter @bethamaiman