Mario Williams won't wear No. 90

The most prized free-agent acquisition not named Peyton Manning will not get the jersey number he wants in Buffalo.

New Buffalo Bills defensive end Mario Williams, who signed a $100 million contract this offseason, will have to find a new jersey to wear in 2012. The No. 90 jersey Williams wore with the Houston Texans is occupied by Bills veteran defensive end Chris Kelsay, who is not giving it up.

"I've worn it my entire career here," Kelsay told the Buffalo News. "A lot of times in a situation like this, the guy will buy it from you. But I'm not really interested in that."

Kelsay, a nine-year veteran, is one of the longest-tenured Bills. He says he's attached to the number. In fact, every jersey from No. 90-99 is occupied in Buffalo.

Williams will have to pay one of his teammates who are more willing to make the switch soon.