I would love for Withers to make me come back and eat this post. But, I just wouldn't play him anymore. I know Cross is obviously out which makes it tougher to sit the guy, but he's just a train wreck. And I know this team has a ton of issues, not just Withers.
He just doesn't do enough to warrant the playing time he's getting. His bad plays are really bad and he's not atoning for the bad plays at all. This isn't a slump, it's his season to date. I'd go small. I hate calling out players, I'd say that Mack needs to grow a pair and yank the kid's minutes.