United acquire M Alex Caskey from Sounders

WASHINGTON (AP) - D.C. United have acquired midfielder Alex Caskey from the Seattle Sounders for a third-round pick in the 2016 MLS draft.

The 25-year-old Caskey made 30 appearances with 17 starts over the last two seasons for the Sounders, scoring one goal with four assists.

He was originally selected in the third round of the 2011 draft. United open their season Saturday against the Columbus Crew.