Houston Texans running back Arian Foster will miss the rest of the season after learning his ailing back requires surgery.
Foster missed practice Thursday and Friday and was ruled out for Sunday's game against the Arizona Cardinals because of a lumbar issue in his back, Texans interim head coach Wade Phillips announced Friday.
After seeking multiple opinions, Foster opted to have season-ending back surgery, NFL Network reported Sunday morning.
Foster was forced to leave last week's game against Indianapolis because of the back issue, and he visited multiple back specialists this week, attempting to figure out the root cause of the problem. Foster had a hamstring injury the previous week, and the belief is that all of the core-related issues are connected.
Foster rushed for 1,424 yards last season and has 542 yards in eight games this year.
Ben Tate, who has been playing despite four cracked ribs, becomes the Texans' primary running back in Foster's absence.
Tate is scheduled to be an unrestricted free agent in March. Entering Sunday's game against the Cardinals, Tate had 88 carries for 399 yards, matching Foster's 4.5-yard per carry average. He also had 17 receptions.