By Matt Zahn

LAKE FOREST, Ill. (CBS) — Bears quarterback Justin Fields is getting ready for another marquee quarterback matchup Sunday – this time against the Baltimore Ravens’ Lamar Jackson, one of the best athletes to ever play the position.

Fields has been studying Jackson’s game since before he was even in the NFL.

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“When I was in college, I would turn on his highlights and just kind study how he kind of ran the read option, how his feet were, and how he got a running start,” Fields said. “There’s not many guys who are like Lamar Jackson. I mean, you should just call it what it is. I mean, he does stuff that some receivers, running backs can’t even do. It just shows that, you know, it’s kind of a new wave coming in, and you know, athletic guys can play quarterback also.”

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Miami provided a bit of a blueprint to stop Jackson last week, blitzing him relentlessly. The Bears can use that but also know he’s still a big challenge to slow down.

“A lot of people try to blitz to limit his mobility. He’s progressed as a quarterback. He’s making his throws,” said Bears safety Tashaun Gipson. “I think that laying him, you realize the speed you see on film and the speed on game end – he’s even faster in game-like situations. The speed is there on film, but when you see him live in person, man, dude can run.”

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Jackson left Ravens Ravens practice with an illness, but Coach John Harbaugh does not believe it’s COVID related.