An undrafted rookie hasn’t started for the New York Jets at quarterback in 50 years.

That will change on Sunday against the Jacksonville Jaguars: Brady Cook will start for the Jets in Jacksonville, head coach Aaron Glenn announced.

Adrian Martinez, signed to the practice squad this week, will serve as the No. 2 quarterback. Martinez was with the Jets in training camp and then spent most of the season with the San Francisco 49ers. Both Tyrod Taylor (groin) and Justin Fields (knee soreness) didn’t practice this week and were declared out.

“I have all the confidence in the world” in Cook, Glenn said. “That’s something I’ve stated from the beginning. He’ll be a good player in this league.”

Cook received the first NFL snaps of his career last week against the Miami Dolphins when Taylor inju

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