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The four-star quarterback's father and grandfather both played for the Tigers and he's visited the campus often. He's familiar with the facilities, and there's not much left for him to learn about the football program. Somehow, though, Mizzou's junior day avoided seeming stale.
"It was a little different this time," Lock said. "I finally got to put some names to faces and meet the other top guys that Missouri looking at. I met Hale Hentges and talked to him a lot. He looks 6-foot-5 or 6-foot-6."
Further visit plans are complicated because of a hectic basketball season. Aside from being a four-star quarterback, Lock is also a BCS-level basketball recruit who carries offers from Oklahoma and others. It's the reason why unofficial football visits are hard to come by and why he may not show his face at many other junior days.
"I might be going to Tennessee's but I haven't been able to plan that because of basketball," he said. "It's hard to know when basketball ends. I might not be able to take many visits until it's over."
As for which sport he'll play in college, Lock says he is beginning to lean toward football but doesn't rule out basketball or the idea of playing both. For now, the football interest is heavier. It simply seems to keep arriving.
"I want to visit Oklahoma again," Lock said. "I've seen Oklahoma on the basketball side, but I've never seen it as a football recruit, so that would be cool. Coach (Josh) Heupel came up to watch me throw a few weeks ago, and we've been calling each other every other week since."
A junior at Missouri's Lee's Summit High School and the No. 148 overall prospect in the country, Lock is also seeing increased football interest from Kentucky, Iowa State, West Virginia, Penn State.
Rob Cassidy is a West Region football recruiting analyst for Rivals.com. You can click here to follow him on Twitter.
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