The Vikings will try to get Jennings, who was a surprise scratch on Sunday against the Seattle Seahawks with a strained right Achilles tendon, a full day of practice on Thursday, Frazier said. Though he added Jennings "had some soreness" on Wednesday morning. The coach, meanwhile, is "cautiously optimistic" Peterson will be able to play after being limited by a strained groin against the Seahawks.
"We'll see what we need to do this week. Is he able to practice today or tomorrow, or do we hold him back until Friday?," Frazier said. "We'll make that determination this afternoon when we sit down and talk with our trainers."
In other Vikings injury news:
The Vikings were also without center John Sullivan, who had not cleared the NFL's concussion protocol in time to practice on Wednesday. Joe Berger is preparing to start if Sullivan is not cleared before Sunday.
Linebacker Erin Henderson missed practice, but the team said the reason for the middle linebacker's absence was not injury-related.
Lastly, wide receiver Greg Childs returned to practice for the first time since tearing the patellar tendons in both knees last August. The Vikings have three weeks to activate the second-year player from the physically-unable-to-perform list or put him on injured reserve, but Childs was still hopeful he could see game action this season. "I’m going to work hard and I”m going to get on the field," he said. "There was never a doubt that I was ever going to play again."