Span, who turns 32 in February, is coming off a season in which he played just 61 games because of various injuries.
He is a .287 career hitter in eight years with the Twins and Nationals and can play all three outfield positions.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.
