The 2012 Millrose Games, was held for the first time at the Armory Track &amp; Field Center and Lagat ran an American indoor record over 5000 m with a time of 13:07.15 minutes. At the 2012 Olympics in London, Lagat finished fourth in the 5000 m race, crossing the line 1.33 seconds behind the leader, Mo Farah, after being tripped up when he was going into his kick by Isiah Kiplangat Koech. Lagat was runner-up behind Matthew Centrowitz Jr. at the Fifth Avenue Mile that year.