An Alabama running back on Thursday posted new information about an injury he played through this season.

Josh Jacobs said he was going to have surgery Friday.

"Lowkey nervous about having surgery tomorrow I've been playing on a broke (sic) ankle since week 5," Jacobs tweeted Thursday night. It's definitely been hard playing knowing that any play could be your last. I'm grateful and blessed to had finish the season much more coming soon #Blessed #Bama #RollTide #TheReturn"

Jacobs wore a walking boot to national championship media day Saturday but said it wasn't anything major.

The sophomore missed the first few weeks of the season with a hamstring injury. He then left the Sept. 21 Tennessee win with an ankle injury but Nick Saban said he was medically cleared to play following a bye against LSU.

Jacobs never missed a game, getting six carries in each of the final three games of the season. Saban called him the spark that ignited the offense after falling behind at Mississippi State.

In the national championship game Monday, Jacobs ran it three times for eight yards.

Michael Casagrande is an Alabama beat writer for the Alabama Media Group. Follow him on Twitter @ByCasagrande.