In one of the most bizarre injuries of the year, Steelers wide receiver JuJu Smith-Schuster suffered a right foot/ankle injury early in the fourth quarter of Sunday's game vs. the Jaguars after stepping on a referee's penalty flag, CBS Sports' Evan Washburn reported on the game's television broadcast.
Smith-Schuster limped off the field and had his leg briefly looked at by trainers.
The Steelers led 20–3 at the time of Smith-Schuster's injury and held on to defeat Jacksonville, 27–3.
Smith-Schuster celebrated his 24th birthday on Sunday, finishing the contest with four catches for 19 yards.
With the victory, Pittsburgh moved to 10–0.
The Steelers host the Ravens this Thursday night.