FRISCO, Texas -- The return of Dallas Cowboys cornerback Trevon Diggs will have to wait at least one more week.

The Cowboys did not activate him from injured reserve on Saturday and he's been listed as out for Sunday's game against the Minnesota Vikings . Diggs has to be added to the 53-man roster by Dec. 20, or he will remain on injured reserve for the rest of the season.

Diggs said Friday he expected to play against the Vikings after taking part in three practices, although he was listed as a limited participant. Coach Brian Schottenheimer said earlier in the week that Diggs needed to show consistency in "everything" in order to get back on the field.

"He's still in the ramp-up period," Schottenheimer said during the week. "I think he does feel healthy. I know he wants to play.

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