Wizards: Washington, lacking wing depth because of injuries, signed swingman Rasual Butler, 35, to a one-year, nonguaranteed contract, according to a source with knowledge of the situation. Butler had been one of four players vying for the final spot on the Wizards' 15-man roster. He secured it when the other three — Xavier Silas, Damion James and John Lucas III — were waived, the Wizards announced Saturday. Washington signed Butler, a training camp invitee, to the NBA minimum of $1.448 million for players with 10-plus years in the league, which puts Washington $50,718 below the luxury-tax threshold. The Wizards have until Jan. 10 to release Butler before his contract becomes guaranteed.