2023 Bank of America Chicago Marathon

Kiptum's reported 4:21 19th mile and 4:18 22nd mile were the two fastest splits ever recorded in a marathon, but after an investigation by LetsRun.com, race organizers have confirmed discrepancies with those splits.

Mantz and Young ensured at least two Americans will be at Paris 2024. Galen Rupp was on track for the standard late but faded and ran 2:08:48 in his return.

Hassan medalled in the 1500 at Worlds on August 22 and won Chicago in the second-fastest time ever just 43 days later.

Kiptum, who had never run a marathon 12 months ago, now owns three of the six fastest times ever.

With temps in the 40/50s on Sunday, Kenyans Kelvin Kiptum and Ruth Chepngetich have set their sights on the course records -- and maybe more.

Plus Conner Mantz has thoughts on the Olympic Marathon Trials and the qualifying system.

Americans Emma Bates and Emily Sisson are ready to battle at the Chicago Marathon as Ruth Chepngetich goes for the three-peat.

Rupp says he has overhauled his form after years of injury issues -- "I hate going back and looking at videos of myself running last year."

Can Ruth Chepngetich, who ran 2:14:18 in Chicago last year, get close to Tigst Assefa's 2:11:53 WR? How will Sifan Hassan do after her World Championship triple three weeks ago?

Conner Mantz and Galen Rupp lead a strong US field; what can Kiptum do for an encore after running 2:01 in his first two marathons?

NBC5 Chicago will stream the race online.

Kelvin Kiptum, Conner Mantz, Emma Bates, and Galen Rupp were among the notable names announced by Chicago on Tuesday.

Hassan took down one of the gretest marathon fields in history in London but she'll have her hands full with defending champ Ruth Chepngetich (2:14:18 pb), just 6 weeks after Worlds.