Raciborz, Poland - U.S. Greco-Roman National Team member Ethan Bosch (Colorado Springs, Colo./New York AC) placed fourth at 84 kg/185 lbs. at the Poland Open on Sunday to lead the U.S. squad.    After strolling through his pool on Saturday, Bosch dropped a 5-0 overtime decision to two-time World champion and 2000 Olympian Ara Abrahamian of Sweden in the semifinals. Abrahamian scored the winning points from the clinch.    In the bronze medal match, Bosch then lost to 2003 World bronze medalist Attila Batky of Slovakia, 3-2 in overtime, again losing on the clinch.    2003 U.S. Nationals runner-up Ken Cook (Fremont, Calif./Sunkist Kids) was the only other U.S. placewinner, finishing sixth at 74 kg/163 lbs.