Teddy Bridgewater and Matt Cassel will begin evenly splitting first-team reps on Wednesday.
The Vikings may hold Adrian Peterson out for the preseason.
Vikings signed TE Kyle Rudolph to a five-year, $36.5 million extension through 2019.
FOX Sports' Jay Glazer reports rookie Teddy Bridgewater has already begun splitting first-team reps with Matt Cassel at Vikings camp.
Cordarrelle Patterson missed the team's first practice with a foot injury.
Vikings waived/injured WR Josh Cooper.
Vikings placed CB Captain Munnerlyn (hamstring) on the active/PUP list.
Vikings TE Chase Ford is recovering from left-foot surgery, and will miss all of training camp.
Speaking Thursday, Vikings coach Mike Zimmer confirmed Matt Cassel is the team's No. 1 quarterback heading into camp.
Vikings coach Mike Zimmer is open to moving Chad Greenway to middle linebacker.
Coach Mike Zimmer said Cordarrelle Patterson will continue to return kickoffs despite his increased offensive role.
USA Today's Tom Pelissero considers Matt Cassel the "heavy favorite" to start at quarterback for the Vikings.
Jarius Wright and Jerome Simpson are competing for the Vikings' slot receiver job.
The Minneapolis Star-Tribune said "all the signs point" to Vikings TE Kyle Rudolph breaking out this season.
ESPN Vikings reporter Ben Goessling doesn't project S Kurt Coleman to make the 53-man roster.