Kansas City Chiefs safety Steve Gregory announced his retirement on Saturday.

Gregory, 31, signed with the Chiefs on July 31. He spent six seasons with the San Diego Chargers and two with the New England Patriots. New England released him on Feb. 28.

"After entering the game as an undrafted free agent, I was fortunate enough to play twice as long as the average player," Gregory said in a statement. "I'm tremendously happy with my decision and being able to walk away from this great game both healthy and on my own terms."

Gregory also said that the birth of his daughter Aviana "changed my life's perspective." He plans to pursue a coaching career.

Gregory had 386 tackles, seven interceptions and 27 special-teams tackles in 111 NFL regular-season games (54 starts). He also played 11 playoff games (five starts).

In 2012, Gregory returned then-New York Jets quarterback Mark Sanchez's infamous "Butt Fumble" 32 yards for a touchdown.