Los Angeles Rams offensive tackle Andrew Whitworth is leaving the NFL as a champion. 

Whitworth announced Tuesday he is retiring after a 16-year pro career that culminated with a Super Bowl championship for the Rams over his only other NFL team. 

"My chapter may have closed on the field, but my story is unfinished. Can't wait for my next one," Whitworth wrote on Instagram. "Thank you to everyone who has been part of my journey." 

Whitworth turned 40 last December and made history as the oldest player to start at left tackle in the modern game. 

His career began in 2006, when he was drafted in the second round by the Cincinnati Bengals out of LSU after winning a national championship for the Tigers. He spent his first 11 seasons with the Bengals, earning three Pro Bowl selections and was named an All-Pro first-team pick in 2016. 

Whitworth signed with the Rams prior to the 2017 season and made 71 starts over the past five seasons, garnering All-Pro first-team accolades and another Pro Bowl nod during his first year with the franchise. 

Still considered one of the top left tackles in the game this past season, Whitworth was named the 2021 Walter Payton NFL Man of the Year – an award given to a player for his excellence on and off the field.  

His final honour came in February, when his Rams defeated the Bengals 23-20 in the Super Bowl to win the Lombardi Trophy. 

After winning the championship, Whitworth had been expected to retire and go out on top. The Rams re-signed his backup, Joe Noteboom, on Monday to a three-year contract worth up to $47.5 million.