Try to hold if you can. He didn't have any usage last year and posted strong 9-cat numbers anyway as a monster defensive specialist.

Herb had stretches last year where he had 3 kinda meh games and we Herb owners started getting worried the glorious Stocks were gone, but they always came back.  It's possible he just started flat this year.  Also possible his knee was bugging him since the pre-season and tried to play through.  I've got him stashed in one of my leagues so hold if you can.