Rest in peace "Russ."

The bulldog who served as Uga IX until retiring from his mascot sideline duties before the 2015 season died Monday morning at age 11.

Russ's final appearance at Sanford Stadium was on Nov. 21 for a collaring ceremony to anoint his grandson "Que" as his successor as Uga X. Russ passed away in his sleep, according to the Seiler family, the long time owners.

Georgia president Jere Morehead took part in the transition and said when Que was announced as the new Uga that "we are are grateful for Russ's dedicated service." Que filled in for Russ this season as he transitioned to retirement.

Russ was Georgia's interim mascot for 25 games, nine in the 2009 and 2010 seasons after his half brother Uga VII died and while UGA VIII was sick before his death. He filled in for all 14 games and two more in 2012 before becoming Uga IX on Sept. 15, 2012.

They keep records of the Ugas. Russ, who had tan spots on his back, was 44-19 overall.

The Frank W. "Sonny" Seiler family of Savannah has cared for and owned the continous line of beloved Bulldogs who have prowled the sidelines since 1956.

• SLIDESHOW: UGA mascots through the years