In July 2010 after 255 games and 14 years of playing AFL - Tredrea retired as Port Adelaide’s most decorated player winning 4 x Club Championships, 4 x All-Australian Guernsey’s, 8 x Leading Goal Kicker Awards and kicked a club record 549 goals.

Since retirement Tredrea has worked with Channel 9 Adelaide in various roles. In December 2013 Warren was appointed as Channel 9 Adelaide's Weekday Sports Presenter alongside News Presenters Kate Collins & Brenton Ragless.

Tredrea has also been a regular radio commentator on 1395AM FiveAA Radio with Rowey and Bicks (4-6pm) and also commentating for “FiveAA Footy” in the “Expert Comments Role” as part of FiveAA’s extensive AFL coverage. In 2022 Warren launched www.thebigdeal.au Podcast/Newletter focussing on the business of sport.

Warren also is a professional and confident Public Speaker on Leadership, Development, Culture & Sport.

On 4th June 2014 Warren was inducted into the Australian Football Hall of Fame for his outstanding performances as a player over his 14 year career.