Late Thursday, the Nationals gave infielder Felipe Lopez and catchers Paul Lo Duca and Johnny Estrada their unconditional releases. The team is expected to recall second baseman Emilio Bonifacio from Triple-A Columbus and activated outfielder Elijah Dukes from the 15-day disabled list. Manager Manny Acta hinted before Thursday's game against the Phillies that changes were coming. He announced that younger players such as Kory Casto would play more often.