Miami Dolphins running back Arian Foster is calling it quits.
Foster -- who signed a one-year deal with the Miami Dolphins in July -- posted a letter on The Uninterrupted announcing his retirement.
"There comes a time in every athlete's career when their ambition and their body are no longer on the same page. I've reached that point," Foster said.
Foster was a four-time Pro Bowler for the Houston Texans before signing with Miami. He finishes his career with 6,257 rushing yards and 54 touchdowns.
"This game has been everything to me.