The Las Vegas Raiders upset the Dallas Cowboys without their premier tight end for most of the game.
Raiders coach Rich Bisaccia had no update on Waller's status after the game.
Waller exited the game midway through the second quarter and was initially deemed questionable. He sustained the knee injury while getting tackled by Jayron Kearse on a 21-yard reception.
The Raiders held a 14-6 lead midway through the second quarter upon Waller's exit, but added a field goal at the end of that drive to make it 17-6.
Waller's day ended with two receptions for 33 yards. Foster Moreau had one catch for three yards in relief of Waller.