Cowboys running back Tony Pollard injured his ankle during the divisional round of the playoffs and the NFL is expected to look into the mechanics of the tackle that led to the injuries this offseason.

49ers cornerback Jimmie Ward grabbed Pollard from behind and then pulled the back down while dropping his own body to the turf. Pollard’s leg got trapped underneath, resulting in a high ankle sprain and fractured fibula. Pollard had surgery this week.