J.R. Smith, who was never enthralled with being a back-up, has been named the NBA's Sixth Man of the Year, according to a league source. A formal announcement will be made at 2:30 p.m. today. Smith, who will become a free agent this summer, averaged 18.1 points in 80 games while helping the Knicks win 54 regular season games. The last Knicks player to win the award was John Starks following the 1996-97 season.