Promising forward Conor Doyle has returned to his native USA after DC United reached an agreement with Derby County.
Derby have allowed USA Under-23 striker Conor Doyle to join DC United until the end of the Major League Soccer season.
Derby forward Conor Doyle is to spend the next week training with MLS side Colorado Rapids.
Saul Deeney, Ross Atkins, Michael Hoganson and Conor Doyle have all agreed new contracts at Derby.
Derby forward Conor Doyle is back in England after undergoing surgery for appendicitis in his homeland.
Derby youngster Conor Doyle faces a spell on the sidelines after emergency appendix surgery.
Derby youngster Conor Doyle will miss the chance to build up his first-team experience after being ruled out for up to six weeks.
Derby County manager Nigel Clough is weighing up when the right time will be to hand Nathan Tyson his debut for the club.