EDEN PRAIRIE, Minn. -- The Williams wall isn't the only part of Minnesota's front four that might be missing this week.
Childress declined to declare Robison out for this week's game against winless Detroit, saying "people heal differently."
Robison is an end by trade, but has played inside some this season.
The players don't count against the 53-man active roster during their punishment. The Vikings filled one of their spots by signing defensive tackle Jimmy Kennedy, who was let go last week by Jacksonville.
Running back Adrian Peterson joined Robison in the training room during Wednesday's practice. He has taken a handful of days off this season to rest. Right guard Anthony Herrera was also absent. He was with family, following the death of his brother.
Copyright 2008 by The Associated Press