Marvin Harrison Jr. of the Arizona Cardinals is being evaluated for a concussion

GREEN BAY – Arizona Cardinals rookie receiver Marvin Harrison Jr. left the game in the first half and is being evaluated for a concussion against the Green Bay Packers.

Harrison looked shaky after being hit on an incomplete pass and headed to the blue medical tent.

After spending some time in the medical tent, Harrison came out and sat on the bench on the sideline before finally standing up and putting on his helmet.

It looked like Harrison was ready to spring into action, although he wasn't present on Arizona's ensuing offensive possession and briefly walked back to the blue tent before being escorted to the locker room.

Harrison – the league's No. 4 overall pick – had 17 receptions for 279 yards and four touchdowns in Week 6 against Green Bay.

Harrison and Murray have shown their potential as a QB-WR duo in this league, but have been far more inconsistent than they would have liked.

Murray said the two just need to get better, but that will grow over time.

“We have to be better. I have to be better. And they will come. There are no slackers over there, this is a good team. Competitive catches and things like that, at some point we will continue to strike. I’m not doing that. I really pushed for it.”

This article will be updated as more information becomes available.