Mel Kiper Jr. breaks down which teams could be interested in Myles Jack in the NFL draft. (1:00)

SANTA CLARA, Calif. -- Chip Kelly was hired to rebuild the San Francisco 49ers in general, the offense in particular. We get all that.

So shy of a franchise quarterback still sitting there when the 49ers' turn to pick comes up at No. 7 overall, where do they go?

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ESPN NFL draft guru Mel Kiper Jr. sees the 49ers going defense in general, outside linebacker in particular, and selecting UCLA's Myles Jack in his Insider Mock Draft 2.0 and, really, Jack would seem a nice complement to pass-rusher Aaron Lynch and the aging Ahmad Brooks.

Lynch and Brooks each played in 14 games a year ago and the two tied for the team lead with 6 1/2 sacks a piece. Their combined 13 sacks were nearly half of the 49ers' total of 28 on the year.

But at just 6-feet-1, 225 pounds, Jack is undersized to play on the outside of the 49ers' 3-4 defense and may be a better match to play inside, next to All-Pro NaVorro Bowman, and ahead of Michael Wilhoite and Gerald Hodges.

While Jack's versatility can also have him playing strong safety -- the third-year junior also played running back at UCLA -- he is coming off a torn lateral meniscus that limited him to just three games last season and he is not cleared to participate in the combine.

A stretch at No. 7? Perhaps, but one that could pay dividends in a relatively short time.

"Personally, I feel great," Jack told ESPN.com this week. "The knee, I can do whatever I can do with the knee, running, cutting. It feels great. It feels like a new knee.

"It'll check out fine.”