Peter Kosgei was the most successful runner in the history of the Hamilton College men's cross country and track & field programs.

Kosgei, who hails from Kapsabet, Kenya, captured nine national titles and 11 All-America awards, and holds 11 school records. Kosgei owns every school outdoor track record from the 800 through the 5,000 meters and every indoor record from the 800 through 3,000 except for the 1,500.

Kosgei was a three-time All-American and the 2008 national champion in cross country. He finished first in the NCAA Division III Atlantic Region championships three times. He is the first athlete to win the NESCAC most outstanding performer award four times. He holds the Hamilton 8-kilometer course record of 24 minutes, 39.9 seconds, and the team's all-time record of 23:42 set at Lehigh University in 2009.

In indoor track, Kosgei was the national champion in the 800 meters and the mile in 2008, and again in the mile in 2009. He was selected the 2008 U.S. Track & Field and Cross Country Coaches Association (USTFCCCA) Division III men's indoor track athlete of the year. He was the Liberty League track performer of the year in 2008 and 2009, and set school indoor records in six events.

In outdoor track, Kosgei ran to NCAA titles in the steeplechase and the 5,000 meters in 2008 and 2009, and the steeplechase in 2007. He was selected the USTFCCCA Division III men's outdoor track athlete of the year in 2008 and 2009. He was voted the NESCAC most outstanding male performer at the conference's outdoor championships in 2008 and 2009, and owns four school records.

Kosgei's steeplechase time of 8:43.78 at the 2008 Penn Relays was the second-fastest in Division III history, and met an Olympic standard. His pursuit of more accolades was cut short by a leg injury in the middle of the 2011 indoor season. He never competed during the outdoor season after he suffered two broken legs and a broken arm as the result of a brutal attack while he was visiting family in Kenya in March.

Kosgei was honored by the Hamilton athletic department as its male recipient of the 2011 Riffle Award. The award has been presented annually since 1987 to the most outstanding Hamilton male and female senior athlete. Kosgei is continuing his education by enrolling in a doctorate degree program in the fall of 2011. Kosgei will study material chemistry at Binghamton University for four to five years.