Jefferson will undergo surgery next week in Green Bay with renowned foot specialist Dr. Robert Anderson. Jefferson is projected to be sidelined 6-8 weeks, but is expected to be healthy long before training camp. Jefferson still is considered a Day 2 pick in the NFL draft, per one league source.
The injury was previously undetected and Jefferson was asymptomatic, which makes the injury something of a mystery.
Jefferson had been working out and looking forward to participating in the combine in all drills, coming off a strong season and Senior Bowl performance.
Jefferson might have been able to do the drills at the combine, but doctors did not want the injury to get worse and disqualified him for liability purposes.
"This is a common injury in football players, and is correctable," said Kevin Farmer, a doctor at the University of Florida. "We look forward to helping Van get back to football activities as soon as possible."