Two more top prospects expected in for visits

Add North Carolina State defensive end Mario Williams and Oregon receiver Demetrius Williams to the list of players who are expected to visit with the 49ers before the April 29-30 NFL draft. has learned that Williams and Williams have visits set with the team, which also has visits set with Iowa linbacker Chad Greenway and USC defensive back Darnell Bing.

Bing already has met with 49ers' personnel at the NFL scouting combine in late February and again before USC's Pro Day workout last Sunday. He is expected to visit extensively again with 49ers officials at the team's Santa Clara headquarters before the end of next week.

Bing raised his stock with a fine performance at USC's Pro Day. The 49ers will seriously consider Bing if he still is on the board when they pick in the second round. San Francisco currently owns the fifth pick in the second round, the No. 37 overall.

Mario Williams' stock has climbed to the point that he may no longer be an option for the 49ers when they pick in the first round of the draft with the No. 6 overall selection.

Several draft analysts now have Williams rated as a top-4 pick, and many don't expect him to slide past the Green Bay Packers, who own the No. 5 pick directly in front of the Niners.

Williams, a 6-foot-7, 295-pound defensive end, has star quality written all over him and is expected to be one of the first two defenders selected in the draft along with Ohio State linebacker A.J. Hawk - another possible candidate for the 49ers' No. 6 pick. With 4.66-second speed in the 40 for a man his size, Williams has all the tools to be a premier defensive end at the NFL level.

Demetrius Williams - while not a first-round or early second-round prospect such as Mario Williams or Bing - also has been rising up draft boards.

While opinions vary on the 6-foot-2, 191-pound speedster, some analysts have him rated as a top-5 receiver in this draft and several have him generally regarded among the top 10 WR prospects available.

Williams has a proximity connection to the 49ers. He grew up in the San Francisco Bay Area city of Concord and was a star in high school at nearby De La Salle, a national prep football powerhouse.

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