Just when it seemed the Oakland Raiders were gaining momentum for a Super Bowl run, they lost their MVP candidate and team leader to a season-ending injury.

Derek Carr suffered a broken fibula in the fourth quarter of Oakland's win over the Colts on Saturday. Coach Jack Del Rio said Carr will likely undergo surgery on Sunday and is out indefinitely.

Related players: Matt McGloin

Carr later tweeted Saturday night, "I will bounce back and be on my feet in no time! Thank you for all of the love that you Raider Nation showed me in that stadium today. I will be back. This is a team sport! So everything WE want is still out there for us!" It's still a crushing blow for fantasy owners playing in Week 17, and obviously for the Raiders who were poised to make a Super Bowl run. Matt McGloin will take over with a week to prepare before the playoffs begin. Connor Cook is the team's QB3.

Derek Carr's injured pinky didn't keep the Oakland Raiders out of the playoffs and hasn't hindered his passing ability, but it's become a problem in the red zone.

Since dislocating his pinky finger, Carr has taken snaps exclusively from the shotgun or pistol formation. (Carr actually lined up under center for one play Sunday versus the Chargers to try to draw defenders offside on a first down from midfield. It worked.)

"Yes, it is somewhat of an issue," coach Jack Del Rio said of not being able to take snaps under center, via ESPN.com. "It is not ideal. Being completely honest about it, it is an issue that we are working through, but it is the way we're choosing to work through it right now."

Playing exclusively from shotgun or pistol becomes more difficult in the red zone. It's tough to be successful on power run plays from those formations in the restricted space near the goal line. Not going under center can also throw off timing on certain routes.