The former UCLA linebacker will be among the prospects visiting San Francisco this weekend, per NFL Media Insider Ian Rapoport. Notre Dame offensive tackle Ronnie Stanley and four cornerbacks -- Ohio State's Eli Apple, Clemson's Mackensie Alexander, Maryland's Sean Davis and Minnesota's Eric Murray -- are among the 49ers' other visitors this weekend, according to Rapoport.
The 49ers hold the No. 7 overall pick, and Jack figures to be tough to pass on if he's available when they're on the clock. All four NFL Media analysts that have posted top-50 rankings place Jack among the top three prospects in the draft. He goes as high as No. 4 overall to the Cowboys and as low as No. 10 to the Giants in NFL Media mock drafts.
Jack suffered a season-ending right knee injury during practice in September and underwent surgery on the knee. He received medical clearance from UCLA's surgeon in early March and participated in UCLA's pro day on March 15, where he posted an impressive 40-inch vertical, even though he said he was only at 80 percent for the workout. However, he's unlikely to run a 40-yard dash for NFL teams before the April 28-30 draft. Jack's knee will be examined next week at the league's annual medical recheck in Indianapolis.
Stanley, Apple and Alexander are considered among the top prospects at their respective positions. Stanley is considered a likely top-10 pick.