Mattison (undisclosed) is not practicing Wednesday, Dane Mizutani of the Pioneer Press reports.

EDGE Analysis

Mattison has been sidelined with an undisclosed issue since Aug. 23, and the nature and severity of his injury remains undisclosed. With less than two weeks remaining before Sept. 12's season opener in Cincinnati, Mattison's status will warrant close monitoring. With Kene Nwangwu (knee) also not practicing, starter Dalvin Cook is currently the only healthy running back on the Vikings' roster.