Maybe the Detroit Lions are just doing their diligence on as many potential draft picks as possible, but Tuesday's visit by former Buffalo outside linebacker Khalil Mack should only fuel more speculation that general manager Martin Mayhew might try to move up from No. 10.

Todd McShay currently projects Mack will go third to the Jacksonville Jaguars in his latest mock draft, while Mel Kiper Jr. has the Oakland Raiders taking Mack at No. 5 in his latest mock draft.

Mack is at least the third top prospect to make a pre-draft visit to the Lions. Potential number one overall pick Jadeveon Clowney of South Carolina visited last week.

This month, the Liions also hosted Clemson receiver Sammy Watkins, projected by Kiper Jr. to go third to the Jaguars and by McShay to go fifth to Oakland.

In reporting on the visit, the Lions' team website quoted Mack as saying it would be fun to play in a defense like Detroit's.

"Just talking to coaches you can't help but get excited," Mack told DetroitLions.com. "Just being able to be mentioned with and play with a guy like [Ndamukong] Suh and [Nick] Fairley and all those guys inside.

"Knowing all those guys they have around them in [DeAndre] Levy. [Ziggy] Ansah is a new addition to the madness coming off the edge. Somebody has to get single blocked, and that’s fun."