Dynamo acquire Samuel Inkoom, Joe Willis from DCU for Andrew Driver

During the four-hour trade window ahead of Wednesday's Expansion Draft, the Dynamo made moves to send Andrew Driver and a fourth-round 2016 SuperDraft pick to DC United in exchange for defender Samuel Inkoom and backup goalkeeper Joe Willis.

Inkoom, who hails from Ghana, signed for DCU in September and featured in just two matches this year. The 25-year old provides depth at the right side of midfield or defense and comes with experience from the 2010 and 2014 World Cups where he made the Black Stars roster.

Willis, 26, did not play in the regular season this year but has featured in 23 games combined over the previous three seasons. Playing backup to Bill Hamid, Willis found opportunity during national team callups and injury to start in goal.

The move will secure an experienced keeper in Willis who will likely continue to play as backup this time to Tyler Deric. Inkoom should challenge Kofi Sarkodie for the outside back position and provide coverage for Boniek Garcia during international callups.

Andrew Driver, whose option was not picked up last week, will join former Dynamo defender Bobby Boswell as DC United looks to capitalize on a strong season.

The limited trade window (which also saw moves like Aurelien Collin to Orlando City SC) provides teams an opportunity to do quick transfers ahead of releasing protected lists for Wednesday's Expansion Draft. The release of protected players is expected to be made public on Tuesday.