Souza was placed on the 15-day DL on Sunday, Dan Kolko of MASN Sports reports. Though Souza indicated he didn't expect to miss much time as a result of the shoulder injury suffered Saturday, the Nationals couldn't afford to wait for him to get healthy with Jayson Werth also banged up. Michael Taylor was recalled from Triple-A Syracuse to take Souza's spot on the 25-man roster.