BYU quarterback Taysom Hill left the game against Utah State with an apparent leg/ankle injury in the second quarter.

He was carted off the field after being looked at by the team's training staff on the sideline. He was in a lot of pain, and his return is uncertain.

Here's a GIF of the play Hill was hurt on:

(Courtesy: @cjzero)

Hill's a big part of No. 18 BYU's success this season. The team's 4-0 heading into Friday night, and Hill went into the game having thrown for 876 yards and six touchdowns, and having rushed for 428 yards and seven touchdowns.

BYU trailed 28-14 at halftime.