"He's pretty sore and just backed off the work today," coach Leslie Frazier said. "(We wanted to) give him another day to get ready for Sunday."
Jennings' presence could be particularly important if the Vikings decide not to start receiver Jerome Simpson, who was arrested last Saturday for drunken driving. Frazier said Simpson would play, but did not disclose whether he would start.
The Vikings, though, should almost be at full strength on offense; tight end Kyle Rudolph is out with a fractured foot, and tight end Rhett Ellison, who is questionable with an ankle injury, is the only other offensive player listed as anything less than probable.
That means running back Adrian Peterson, who missed practice the past two days with a groin injury, is probable, as is quarterback Christian Ponder, who dislocated his left shoulder last Thursday against Washington.