Doyle is the latest acquisition for the struggling MLS club, and he will join United on loan, where he will provide another option at striker.
The 21-year-old striker joins from Derby County in the English Championship, where he had been since signing in 2010. During three seasons with the club, Doyle made 23 appearances with the first team while battling various injuries and playing for the reserve team.
“Conor is another quality young talent who has advanced international soccer experience for his age,” said D.C. United general manager Dave Kasper. “This loan will allow us to take a close look at him with an eye on the future. We look forward to Conor’s arrival in D.C. and to integrating him among our strong core group of up-and-coming players.”
Doyle has been capped six times by the USA at the U-20 level, and once at the U-23 level, and he scored twice in the 2011 CONCACAF Under-20 championship. He is also eligible for Ireland's national team, and has been capped once by the Ireland U-20 team.
Doyle had been training with the Colorado Rapids, who had expressed interest in acquiring him, but the club was prohibited from entering the lottery for his services after winning the rights to Cameroonian forward Charles Eloundou.