By Dave Sherwood and Nelson Acosta HAVANA (Reuters) – The United States is blocking some of Cuba´s top players from participating in the upcoming World Baseball Classic, Cuba´s vice foreign minister said on Wednesday, the latest in a series of spats over a sport beloved by fans in both nations. Cuba last month asked several players who in recent years had defected from the Caribbean island – long famed for its baseball talent – to represent their home country in the World Baseball Classic in March 2023. Others volunteered on their own. Vice Foreign Minister Carlos Fernandez de Cossio said that…