Waller (knee/back) is listed as a non-participant on Wednesday's estimated practice report, Scott Petrak of the Elyria Chronicle-Telegram reports.
Like Tuesday, the Raiders didn't hold a formal practice, leaving Thursday as Waller's only chance to get on the field this week. Interim head coach Rich Bisaccia referred to the tight end as questionable earlier this week, but it isn't looking especially promising for Waller as the Raiders prepare for Saturday's game against the Browns. Backup tight end Foster Moreau (abdomen) was listed as a limited participant Tuesday and Wednesday.