Coach Dave Wannstedt decided to go with Carey instead of using former left tackle starter Wade Smith, who replaced St. Clair for the final quarter and a half last Sunday.
"His number is called and he's got a big opportunity," Wannstedt said Wednesday. "He was in there with (offensive line coach Tony Wise) last night, early this morning. He is going to prepare himself and he is looking forward to it. This is why we drafted him. He's going to get his shot on Sunday."
It's a great opportunity for Carey to silence all the critics who have bashed the Dolphins for sending Minnesota a fourth-round pick to move up one spot in the first round and select Carey 19th overall.
It also will be a lot better for Carey to be in the lineup as opposed to watching the game in street clothes the way he did the last two Sundays.
It was something Carey admitted was frustrating.
"Yeah, I mean, you just have to wait your turn," Carey said. "Everything was going on and people were assuming, but I just had to be patient and wait for my time to come."