Red Sox acquired LHP Danny Rosenbaum from the Nationals for C Dan Butler.
Rockies returned Rule 5 LHP Daniel Rosenbaum to the Nationals.
Rule 5 selection Daniel Rosenbaum was very impressive in his Rockies debut on Friday, allowing just one hit over two scoreless innings in a victory over the Brewers.
Rockies selected LHP Daniel Rosenbaum from the Nationals with the third pick in Thursday's Rule 5 Draft.