Pittsburgh Steelers center Fernando Velasco is out for the season with an Achilles tendon tear, according to CBS Sports.
Velasco was filling in for All-Pro Maurkice Pouncey, who is on injured reserve.
Velasco was injured Thursday night against the Baltimore Ravens. He was one of several Steelers injured in the 22-20 loss.
Running back Le'Veon Bell sustained a concussion but it is too early to determine his status for the Dec. 8 game against the Miami Dolphins.
Already thin on offensive line, the Steelers will look for reinforcement with Velasco out. Left tackle Kelvin Beachum and reserve tackle Mike Adams were also injured in the game.