The Phoenix Suns have signed coach Mike D'Antoni to a two-year extension, the team announced Thursday.

The deal puts the reigning NBA coach of the year under contract through the 2008-09 season. D'Antoni directed Phoenix to a 33-game improvement in his 2004-05, his first full season as head coach. The Suns won an NBA-best 62 games but were eliminated by the San Antonio Spurs in the Western Conference finals.

D'Antoni, who spent 20 years in Italy as a player and coach, was the second Phoenix coach to be selected NBA coach of the year. The other was Cotton Fitzsimmons in 1988-89.

The Suns made several other administrative moves.

Former player Mark West was named assistant general manager, player development; David Griffin was promoted to assistant general manager, player personnel; and trainer Aaron Nelson's contract was extended through the 2009-10 season.