GREEN BAY, Wis.  There is no longer doubt that Tramon Williams, the dynamic cornerback of the Green Bay Packers, has the skills to succeed in the N.F.L.: athletic ability, great instincts, smarts and a willingness to work. Williams demonstrated those attributes in the last two weeks, intercepting three passes, one for a touchdown, to help the Packers reach the N.F.C. championship game against the Chicago Bears on Sunday.

So why did no team draft Williams out of Louisiana Tech in 2006? Jack Bicknell III, his college coach, has an even better question about Williams, a Houma, La., native who joined the Bulldogs as a walk-on.

“I’m wondering why we didn’t recruit him in our home state,” said Bicknell, now the Giants’ assistant offensive line coach.

Williams has no answers and no interest in finding out.

“I don’t know what they were looking at at that point in time,” Williams said of N.F.L. scouts. “It’s probably something that I’ll never know.”