The won't wait until game time to test out 's shoulder Luiji Vilain Jersey before making a call on their starting quarterback. Coach announced Friday that Sunday . Palmer will be the backup if he can throw, according . Palmer hasn't thrown all week. If he can't go, rookie will be the backup. Stanton started his first game since 2010 in a over the last week. The 30-year-old quarterback had a woeful 48.3 completion percentage. However, he avoided the big mistake and didn't turn the ball over.Palmer's shoulder injury could last "," Arians said earlier in the week. Clearly, Arians didn't want to wait until the weekend to see if the shoulder nerves began firing.The starting quarterback situation will put more impetus on -- who continues to battle a foot injury -- and the rest of the ' running game, includes .Arians has repeatedly said he has faith in Stanton to run his offense. This week, he didn't wait until game time to display that faith in the backup quarterback. The latest recaps the ' lopsided win over the Bucs and previews . Andrew Booth Jr. Jersey