The Oakland Raiders are utilizing their high waiver-claim priority.

The 0-4 Raiders made their second claim in as many days Tuesday by calming linebacker Ray-Ray Armstrong off waivers from St. Louis. The Raiders put linebacker Kaluka Maiava on the injured reserve with a hamstring injury. Maiava has been riddled by injuries since signing with Oakland last year.

Monday, the Raiders claimed receiver Kenbrell Thompkins off waivers from New England to replace starting receiver Rod Streater, who can return from injured reserve (designated to return) in November.

Armstrong was cut by the Rams after committing a crucial special-teams penalty in a loss to the Eagles on Sunday. Armstrong was penalized nine times as an undrafted rookie from Miami last season. Armstrong, who was dismissed from Miami’s program in 2012, is known as an aggressive, talented player. But his lack of discipline may have cost him.

The Raiders may need Armstrong to play in the defensive rotation because they have been riddled by injuries at linebacker. I’d expect Oakland to continue to being aggressive on the waiver wire through the season as they try to find the right roster mix.