Rooney, now 33, is under contract with DC United until 2021, so it is unclear how a deal would be reached between the two sides at this early stage in negotiations.
"It's only literally been a couple of days".
Wayne Rooney set to return to his home country from MLS to join Derby County, as talks with the Championship clubs are speculated. "I suppose the starting point was we understood Wayne was keen to return to the United Kingdom and of course we had a look at the situation and made a decision to see if we could actually do something on the back of that", Morris told talkSPORT.
"It's never done until it's done but we're obviously focused and very keen to get it over the line this morning [Tuesday]".
Premier League side Burnley and second-tier West Brom have also reportedly declared an interest in Rooney, who is the record goalscorer for England and United.
He has scored 25 goals in 45 games for DC United but could depart to pursue his dream of coaching.
"He's changed everything, he's changed the culture of the club", Birnbaum told the Daily Telegraph.
"Like I said before, the team we are working on completing". I'm confident it will get sorted out but ultimately it's never done until it's done.
Rooney gave short shrift to questions about his future last week.
It's possible that Derby believes Rooney has something to offer on the pitch while also beginning his coaching career, serving as an asset on the field while also potentially learning to follow-up Cocu should he not impress or be lured away after a period of success.
Rooney is eager to get into coaching when he retires, speaking In November to United's official website, he said: "Yeah, it is something I am passionate about and I want to do".
"I'm in the process now of going through my badges".
"I have a desire to go into management and hopefully the right opportunity will come up".