The 49ers’ starting right defensive end is Justin Smith, and their backup right outside linebacker is Aldon Smith.
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McKinnie will likely see a lot of both players Thursday night.
“I’m familiar with Justin from playing San Fran before when I was in the NFC [with the Minnesota Vikings],” McKinnie said. “And when he was in Cincinnati, I played against him. He’s definitely gotten a lot better these past few years. He’s a tough player. The rookie, I’m still learning about him. I see he has good pass-rush moves. They’re two pretty good players.”