Mutual Essa Barshim shows off his name tag after winning the men’s high jump competition after only one attempt from the entire day. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

American Jenny Simpson shows a face of pure joy as she wins the women’s 1500m. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Ayanleh Souleiman of Djibouti smells then cradles his flowers like a baby after winning the Bowerman mile. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Men’s 400m winner Kirani James points to the sky after finishing first in the race.The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Charles Jock warms up before the men’s 800 meter run. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Jamaican Kimarra McDonald and American Channel Price push of the start line of the 800m to set the pace. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

A day Genzebe Dibaba will never forget as she finished with her personal best time and the fastest 5000m of the year. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Runners clear the water obstacle during the men’s steeplechase competition. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Ben Blankenship celebrates after winning the men’s 1 mile international run. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Pascal Martinot-Lagarde raises his bouquet of flowers during his victory lap after winning the men’s 110 meter hurdles. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Men’s 110m hurdler Aries Merritt signs his bib for a fan after finishing second in the race. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Kenyan Eunice Jepkoech Sum celebrates her first place in the 800m. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Nike provided a tent full of merchandise for fans to shop at outside of the meet. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Ayanleh Souleiman fist pumps after winning the men’s 1 mile run. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Justin Gatlin sticks out his tongue after winning the men’s 200 meter dash. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Women’s 100m sprinter Michelle-Lee Ahye is lifted into a wheelchair after suffering an injury towards the end of the race. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Timothy Cheruiyot leads the pack of runners during the men’s 1 mile run international. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Kenyan Ezekiel KEMBOI finishes first in the 3000m steeple chase. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Tyson Gay looks towards the video board for the official time after winning the men’s 100 meter dash. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Renaud Lavillenie clears the bar during the men’s pole vault competition. Lavillenie set a new American record with a final height of 6.16 meters. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Men’s mile winner Ben Blankenship shakes hands with fans while jogging his winner’s lap. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Women’s 400m sprinter Allyson Felix high-fives fans after the end of the race. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

English Gardner crosses the finish line in first place during the women’s 100 meter dash B section. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

English Gardner fist pumps after winning the women’s 100 meter dash B section. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Men’s high jumper Erik Kynard clears the bar on his second attempt. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Michael Tinsley clears the hurdle during the men’s 400 meter hurdles. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

A CMS guard stands behind the south grandstands. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

Women’s triple jump winner Caterine Ibarguen smiles and waves at fans while jogging her victory lap. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Murielle Ahoure celebrates a new personal best time for the women’s 100 meter dash. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Ryan Kang/Emerald)

America Michael Rodgers congratulates his fellow countrymen Tyson Gay on their 1, 2 finish. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29 – 30 2015. (Cole Elsasser/Emerald)

Men’s pole vaulter Valentin Lavillenie celebrates in midair after clearing the bar. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)

Men’s 800m runner Mohammed Aman leads the pack prior to winning the race. The 41st annual Prefontaine Classic welcomes world-class athletes to compete at Hayward Field in Eugene, Ore., on May 29-30 2015. (Taylor Wilder/Emerald)