Recommendation: Peterson is coming back from a torn ACL and MCL in his left knee in December. Peterson appears ahead of schedule as he was running this spring, so this may just be a case of the team trying to hold him back a bit. Since Peterson can be activated from the preseason PUP list at any time, this doesn't necessarily change his outlook for his chances of playing Week 1. However, it may indicate the Vikings are going to be more cautious with his comeback than Peterson would like.
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Update: Peterson (knee) was placed on the preseason active/PUP list, the Minneapolis Star Tribune reports.