In his absence, Penn State will turn to back up Koa Farmer, a California native, at Sam linebacker
Another starter, Blacknall emerged as a key figure in the passing game during the Big Ten Championship Game with six catches for 155 yards and two touchdowns against Wisconsin. Even before that, he had begun to make a difference, taking over as the starter at flanker against Purdue.
Though he had just three catches across his first three starts, each of those went for long gains, including a touchdown against Iowa.
With Blacknall out, former starter DeAndre Thompkins will step back into the line up.