The Arizona-based Olympian was a distant eighth behind race winner Tadese Tola of Ethiopia, who ran the fastest 10 kilometres in Central Park history with a time of 27 minutes 48 seconds.
Yet the Westmeath native, who clocked 28min 45sec, was satisfied to have beaten some world-class runners, including American distance stars Abdi Abdirahman and Anthony Famiglietti and Morocco's Abderrahime Bouramdane, on a hilly course in New York as he builds up to a 10,000 metre track bid at this August's IAAF World Championships in Berlin.
Fagan, whose split time for the first five kilometres was 14:06, has recently recovered from a pelvic injury due to over-training and needed cortisone shots to keep him racing.