Lagat is aiming for his fifth Olympic team.
The 40-year-old broke Haile Gebrelassie's two-year-old mark.
The 2015 Carlsbad 5000 was the 30th edition of the "World's Fastest 5K"
Bernard Lagat sets the masters world record at the 5K road distance.
Here are the top-10 men to watch at the 2015 Carlsbad 5000.
Deena Kastor returns for the first time since setting the American 5K road record in 2002.
New Balance squad takes down women's DMR world record. Bernard Lagat shatters Masters 3000m mark.
The 39-year-old finished second at the inaugural event.
The 10-time global medalist is looking forward to racing in the inaugural 3.1-mile event.
The 39-year-old used his blistering kick in the final 150 meters to claim victory.