The Jaguars stole Jack in the second round, thanks to a knee issue that plummeted his draft stock. Thus far, as Jaguars fans continue to knock on wood, Jack is healthy and has been running with the first-team defense at times. In last week's preseason opener vs. the Jets, Jack looked like the versatile defensive weapon who had NFL types salivating before his meniscus tear at UCLA last September. One of the highlights of the game occurred when Jack lined up across slot receiver Jalin Marshall on third down. Marshall ran a route across the middle, Geno Smith delivered an accurate pass ... and Jack walloped the wideout to force an incompletion. That's the kind of play -- by a 20-year-old who checks in at 6-foot-1 and 247 pounds -- that has Jags fans thrilled about Jack's potential.