Houston Texans are scared to start running back Lamar Miller suffered a torn left ACL during a preseason game against the Dallas Cowboys, a source told ESPN's Adam Schefter.
He will undergo a MRI to confirm the tear.
Miller was brought out of a trolley field in the first quarter in Arlington, Texas. Miller was initially greeted by cowboys battling Malik Collins, who struck him just above the left knee. Miller grabbed his left leg and was checked by medical staff.
Miller has been the Texans' leader since 2016. In 14 games last season, he ran for 973 yards on 210 carries and scored five touchdowns. Miller enters the final season of a four-year contract.
Houston traded to avoid Duke Johnson earlier in the month, but hoped to include two backs in his crime. Miller was replaced in the game by Taiwan Jones.