Hiroshima Carp manager Marty Brown is set for a return to Japan and his fourth season at the helm in what could be the final year for American managers here.

Two years ago, we had four U.S. field bosses with Brown, Bobby Valentine, Trey Hillman and Terry Collins, but is this an era that came along and is about to fade away?

Hillman left the Nippon Ham Fighters in 2007 after five seasons, two Pacific League pennants and a Japan Series championship to manage the Kansas City Royals, and Collins quit the Orix Buffaloes after a season and a quarter in May of 2008.