Arbitrator Billy Cunningham has ruled that forward...

Arbitrator Billy Cunningham has ruled that forward Truck Robinson officially is retired, meaning that the New York Knicks can apply only half of his salary last season to the salary cap, the National Basketball Assn. announced.

Under the league’s salary cap, if Robinson were declared an active free agent, the Knicks could have used the player’s reported $540,000 salary to sign another player.