High school

Eggleston graduated from Greece Arcadia High School in Rochester, NY in 2003 where he played soccer and ran cross-country. He won the boys' unseeded 3 Mile at the 2002 McQuaid Invitational in a time of 15:05.^[3] During track season, Eggleston specialized in the 3200 meters.^[4]

Collegiate

Eggleston attended the University of Virginia from 2003 to 2007, during which he competed in cross country and track.^[5] At the time, UVA had a number of distance runners who would later pursue marathoning, including Andrew Dumm with whom Eggleston trained. While a junior at UVA, Eggleston won the 2006 Charlottesville 10-miler with a time of 50 minutes and 51 seconds.^[6]

Post-collegiate

After college, Eggleston took what many considered a risky move and moved to Flagstaff, Arizona, a popular distance-running hub for prospect marathoners. He linked up with coach Jack Daniels, and followed a very high-mileage training program. In 2011, Eggleston competed in the men's marathon at the world championships where he finished 39th.^[7] Eggleston also won the 2011 Pittsburgh Marathon.^[7] Ahead of the 2013 World Championships, Eggleston ran up to 150 miles per week before his taper phase.^[4] He then competed in the men's marathon at the world championships where he finished 13th.^[8]

In 2014, Eggleston finished 8th at the 2014 Boston Marathon^[9] and won Rock ‘n’ Roll Virginia Beach Half Marathon in 65 minutes 28 seconds.^[10] In 2015, Eggleston finished 12th at the 2015 Boston Marathon. In May 2017, Eggleston placed 1st in the Lima (Peru) Marathon.