Police said Halman, a Dutch native who played in 44 games in the last two seasons for Seattle, was found bleeding from a stab wound this morning inside a home in Rotterdam. Attempts to resuscitate him failed. His brother Jason, 22, was at the house and was arrested by police. Gregory Halman was 24 years old.

Seattle Mariners' Outfielder Gregory Halman Stabbed to Death, Police Say [Bloomberg]
BREAKING NEWS: U.S. baseball star Gregory Halman, 24, 'stabbed to death in Holland by his brother' [Daily Mail]
Greg Halman's Baseball Reference Page