This is the wideout's first year with the Dolphins, and he is still adjusting to their West Coast offense. Still, Armstrong dropped several crucial passes in the Dolphins' Week 3 loss to the Jets. The undrafted receiver told the media,
"I'm not happy with it at all. You want to be able to make plays. Some of them were basically right there in my hands that I wasn't able to capitalize on. I just got to get back to work this week and get ready for Arizona."
He finished the game with two catches for nine yards. Overall, Armstrong was targeted six times and was charged with three drops.
Armstrong and the Dolphins could have a tough time on Sunday, as Arizona has been one of the stingiest pass defenses so far this season.