The Vikings, of course, remain tightlipped about who will start Sunday against Atlanta. Frerotte missed last week's game against Arizona with a lower back injury.
Jackson shone in his place. He threw four touchdown passes in the 35-14 victory that earned him NFC Offensive Player of the Week honors.
Coach Brad Childress says he will evaluate the situation over the next few days.
Defensive end Jared Allen (knee), left tackle Artis Hicks (triceps), nose tackle Pat Williams (shoulder) and kick returner Darius Reynaud (foot) all missed practice with injuries.
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