Shane Roller announces retirement

Shane Roller, 33, has announced his retirement from mixed martial arts, ending a professional career that began in 2007.

Roller, a UFC lightweight, took to his personal Twitter account on Monday, stating he was "hanging up the gloves for good" following a submission loss to Jacob Volkmann in the first round of their recent bout at a UFC on FX event in Minneapolis.

"It was fun, but time to move on," Roller also included in his tweet. "Sux that it ended like that. Now starting the next chapter!"

Roller (11-7) earned a spot on the UFC roster in 2011 with a strong 6-2 run in the WEC. He built a strong case to compete for the WEC title, but inopportune losses to current UFC champion Ben Henderson and Anthony Pettis derailed his chances. During his WEC run, he posted notable wins over Jamie Varner, Anthony Njokuani and Danny Castillo.

His UFC debut began on a high note with a highlight-reel knockout over Thiago Tavares at a UFC Live event in March 2011. Roller struggled to find his groove since, though, dropping four of his last five fights in the Octagon.

A former All-America wrestler at Oklahoma State, Roller became involved in MMA alongside former college teammates Johny Hendricks and Jake Rosholt.