Waller (back/knee) was ruled out Saturday ahead of Sunday's game against Washington, Vic Tafur of The Athletic reports.
Not much of a surprise given Waller was initially listed as doubtful following Friday's final injury report. Foster Moreau now steps in as the Raiders' top tight end and figures to be a crucial part of the offense considering the third-year LSU product had his best game (6-60-1) in the absence of Waller.