But the real injury was to center Fernando Velasco.
Bell is going to be OK, though he must now pass concussion protocol.
But Velasco was placed on injured reserve Saturday with an Achilles' tendon injury.
That's a big blow. Velasco had played well in 11 games in place of Maurkice Pouncey and had been a stabilizing factor.
He hadn't been the team's best lineman - that distinction goes to David DeCastro, but he's been close.
DeCastro (foot), left tackle Kelvin Beachum (knee) and tackle Mike Adams (ankle) were also injured against the Ravens, though none was as serious as Velasco, who was in a walking boot following the game.
With all of that in mind, the Steelers released cornerback DeMarcus Van Dyke and signed offensive tackle Rashad Butler and center Eric Olsen.
Butler, who has appeared in 50 career games and made four starts, gives them some depth. Olsen, who has appeared in 17 games and made four starts, gives them another option at center.
Currently, Cody Wallace is the backup, but he's appeared in just 14 career games with no starting experience.
The Steelers could also shift left guard Ramon Foster to center and play Guy Whimper at left guard. They could also move Beachum to center and put Adams at left tackle.
It will be interesting to see which direction they go.
On a side note, Velasco's injury could help the Steelers in the long-term. He was only signed to a one-year deal and will be a free agent at the end of the season.
Since he'll be rehabbing with their doctors, they'll have a better idea of his progress than any other team. And other teams might balk at giving him a new contract without some knowledge of his rehab process.