A prosecutor in the southern town of Bani says a judge ordered Enrique Soto held while authorities investigate the case.
Prosecutor Francis Valdez said Wednesday that Soto is accused of abusing two brothers he was coaching. He says the victims allege the abuse occurred over six months when they were 16 and 17. Soto faces up to 15 years in prison if charged and convicted.
Soto's lawyers did not respond to requests for comment.
Soto has worked with such major league players as Miguel Tejada and brothers Willy and Erick Aybar.