Greiss (not injury related) departed the NHL's COVID-19 protocols Thursday, Ansar Khan of MLive.com reports.

EDGE Analysis

Greiss was a spectator of Thursday's practice indicating won't return to play this weekend, Khan adds. The 25-year-old Greiss has missed the last 10 days and four games while in the virus protocols. Assuming he doesn't return for this weekend's back-to-back, the next game on Detroit's schedule is Monday against Anaheim.