He was drafted 72nd overall by the New York Mets in 1991. The Mets traded him to the San Diego Padres in 1993 as the player to be named later in an earlier trade for Frank Seminara. The Padres traded Kroon to the Cincinnati Reds for Buddy Carlyle in April 1998.\n', '

Croon joined the Yokohama BayStars in 2005. After the 2007 season, Kroon and the BayStars failed to come to terms on a new contract, and ended up being a free agent. Kroon was later signed by the Yomiuri Giants along with two other major non-Japanese free agents: former Tokyo Yakult Swallows standouts Seth Greisinger, and Alex Ramirez.\n', '

In 2008, Kroon led the Central League in saves with 41. He also broke his own record of pitching to 162 km/h (101 mph).\n', '

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