WATCH LIVE: Chicago Marathon

At Sunday’s Chicago Marathon, Emily Sisson makes her return, nearly three years after Olympic Trials disappointment. Conner Mantz makes one of the most anticipated U.S. men’s debuts in 26.2-mile racing.

It is not the norm, but an American will be one of the spotlight runners in both the men’s and women’s elite races at a major marathon. Peacock airs live coverage at 8 a.m. ET.

Sisson, 30, starts her first mass marathon since dropping out of the Olympic Trials on Feb. 29, 2020, her legs “destroyed” on the hilly Atlanta course where she started as arguably the favorite. She ran the virtual New York City Marathon later in 2020, but that was solo (and not in New York City). Her 2:38:00 isn’t recorded in her official results on her World Athletics bio.

Since, Sisson won the Olympic Trials 10,000m on the track and was the top American in Tokyo in 10th place. She moved back to the roads, winning national titles at 15km and the half marathon and breaking the American record in the latter.

Sisson vaulted into the elite group of U.S. female marathoners in 2019, when she clocked the second-fastest debut marathon in American history, a 2:23:08 on a windy day in London, where the early pace was slow.

At the time, it was the 12th-best U.S. performance all-time. In the last two years, Keira D’Amato, 37, and Sara Hall, 39, combined to run seven faster marathons. At Chicago, a flat course that produced a world record three years ago, Sisson can answer them and perhaps get close to D’Amato’s American record 2:19:12.

“I’m hoping sub-2:20,” coach Ray Treacy said, according to LetsRun.com. “With the [super] shoes and the training behind her, I would think that’s [worth] at least three minutes.”

It is less likely that Sisson can challenge for