Harris wasn't spotted at practice Wednesday due to an undisclosed reason, Chris Mason of The Springfield Republican reports.
Harris wasn't on the Patriots' Week 8 injury report, so it's unclear what's keeping him off the field Wednesday. In this past Sunday's win over the Jets, the running back was on the field for 32 of a possible 78 snaps on offense, carrying 11 times for 37 yards and catching two passes for 15 yards.