After 23 years, Khalid Khannouchi's 2:05:38 American record is no more. Mantz continued an epic 2025 season by breaking the marathon AR to go with his half marathon AR from January.

We've got boots on the ground in Chicago and share the inside scoop with you from Friday's pre-race press conference. Defending champ John Korir confirmed he wants to run sub-2:01 as he faces half-marathon WR holder Jacob Kiplimo who has been running a massive amount of mileage. Plus Kiplimo's handlers really don't want us asking about his association with Federico Rosa, who has had 5 marathon major winnners - all sponsored by Nike - popped for doping violations.

Defending champ John Korir is the 1B to Sabastian Sawe's 1A in the world of marathoning right now. Can he win his third straight major in Chicago or will half marathon WR holder Jacob Kiplimo break through to win his first?

Only three non-African-born men have ever broken 2:05 and two of them have been accused of PEDs. Mantz, who has already set an American record in the half (59:17) and run 2:05:08 on Boston's non-record-eligible course in 2025, is looking to join the club on Sunday. *MB: How fast will Conner Mantz run in Chicago? The AR is 2:05:38. Might he DESTROY that & run in the 2:03s? 

From Amby Burfoot's attack on Chepngetich to Kenyan parliament calling out LetsRun.com's Robert Johnson, the fallout of Chepngetich's WR has been unlike any other. Jonathan Gault tries to make sense of it and reveals that she did recently switch from the Vaporfly to the Alphafly - could that explain her remarkable run?

John Korir became the 6th fastest man in history and joined his brother Wesley as a World Marathon Major winner.

No man has won Chicago in his debut since 2003 but Worlds 10k silver medalist Ebenyo could end that drought. Panning ran great at the Trials through 20 miles while Albertson has been crushing workouts again in his buildup.

With such a strong core of US women, will an American record attempt be on the cards? Jonathan Gault has the inside scoop.

2022 London champ Amos Kipruto (2:03:13) and 2023 Berlin runner-up Vincent Ngetich (2:03:13) lead the somewhat shallow men's field where Daniel Ebenyo will debut while Tokyo champ Sutume Kebede (2:15:55) is the women's headliner.

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.

Kiptum, who regularly runs 150+ miles a week, runs so hard in training that his coach Gervais Hakizimana wants him to slow down: "I told him that in five years he would be done, that he must calm down to last in athletics."

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.

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

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

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.

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?

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