Minnesota Vikings quarterback Matt Cassel’s season is over. He was placed on injured reserve with multiple fractures in his left foot on Wednesday.

Cassel was injured Sunday at New Orleans, when he left the field in the second quarter unknowingly passing the torch to rookie first-round pick Teddy Bridgewater.

Bridgewater is preparing for his first NFL start Sunday at TCF Bank Stadium against the Atlanta Falcons. He completed 12 of 20 passes for 150 yards last week.

It has been a tumultuous 10 days of turnover for head coach Mike Zimmer’s roster. Adrian Peterson was placed on the exempt list a week ago, before Cassel and tight end Kyle Rudolph (hernia surgery) went down with serious injuries in a 20-9 loss to the Saints.

The downward spiral might appear dramatic from the outside after Minnesota won easily in Week 1.

“You sign up for everything when you become the head coach. You sign up for the good days and the bad days, the days where you get beat whatever the score was yesterday, 30-7, and the 34-6 wins. It’s not my most favorite time, but that’s the way it is.

In addition to the Cassel transaction, guard Brandon Fusco was placed on injured reserve. The Vikings signed tight end Chase Ford and offensive lineman Austin Wentworth to the active roster. Both players were on the practice squad.

While former first-round pick Christian Ponder remains on the roster as Bridgewater’s backup, the Vikings do not plan to add a third to the 53-man roster this week. Instead, McLeod Bethel-Thompson was signed to the practice squad Wednesday.

“Moving forward, I think I am definitely going to be ready,” Bridgewater said. “I just need to get more practice reps throughout the week. As a backup, it’s all about getting mental reps during the week. But now we have seven days to prepare for Atlanta, so we have time to develop that chemistry with the guys and be able to be a better quarterback.”