The New York Knicks signed forward Rasheed Wallace, a four-time All-Star who is ending a two-year retirement.

Wallace, 38, last played for the Celtics in the 2009-10 season. Terms of his contract, which was signed Wednesday, were not announced.

Wallace averaged 14.6 points and 6.7 rebounds in 15 seasons. The temperamental 6-foot-11-inch Wallace frequently clashed with referees but was a respected teammate and versatile player who helped the Pistons win the 2004 NBA title. Knicks coach Mike Woodson was an assistant on that team.

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Stopping flopping

The NBA will penalize floppers this season, fining players for repeated violations of an act a league official said has ‘‘no place in our game.’’ Players will get a warning the first time, then be fined $5,000 for a second violation. The fines increase to $10,000 for a third offense, $15,000 for a fourth, and $30,000 the fifth time. Six or more could lead to a suspension. The players’ association plans to file a grievance with the league office and an unfair labor practice charge with the National Labor Relations Board . . . , arguing that it should have been consulted first before the new rules were implemented . . . Dana Davis, vice president of basketball operations for the Grizzlies, was found dead in his apartment. He was 56. The Grizzlies confirmed Davis’s death in a statement without elaborating. The Commercial Appeal reported Davis had not been heard from since Tuesday, prompting team personnel to enter his apartment Wednesday with officers from the Memphis Police Department, where they found Davis.