Jaguars receiver Reggie Williams will have arthroscopic surgery after re-injuring his right knee during training camp, the third setback in two weeks for Jacksonville. Williams initially hurt his knee while working out last week and opened camp on the physically unable to perform list. He was activated Tuesday and returned to practice, but tweaked his knee during the evening session. Jaguars coach Jack Del Rio said Williams damaged cartilage in his knee. He expected the former first-round pick to make a full recovery, but declined to offer a timetable for his return.

Willams the ninth overall selection in 2004, Williams had his most productive season last year. Although he caught just 38 passes, he averaged 16.6 yards a catch and had 10 touchdowns.

His injury was the third significant one for the Jaguars in two weeks. Jerry Porter, who signed a six-year, $30 million contract in February to be the team’s No. 1 receiver, had surgery July 18 to repair a torn hamstring and will miss at least the entire preseason.

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