Both Coyle and the USA midfielder's national manager Jurgen Klinsmann watched him play 65 minutes against Rochdale this week - and are delighted to see him back on the field.
Coyle said: "It's great to have him back. I think he has probably been getting a little bit frustrated because he thinks he can click his fingers after being out for six months and get back at the level he was at.
"It takes time to build up that fitness and your decision-making in a game, but it was great to see him running about with a Bolton Wanderers shirt on, albeit in a reserve game.
"It will be a tremendous boost when we get him back, and for Jurgen Klinsmann to make that trip when it was pouring down and to stay all night to watch the game is all credit to him.
"He showed his class, and there is no doubt that Stuart will reward him when he is fully fit with big performances for the national team."