The former Bowerman TC athlete, 31, has called it a career. Derrick spoke to LetsRun about his career, mistakes he's made, lessons he's learned, Shelby Houlihan, and how he'd improve the sport.

The former Bowerman TC athlete, 31, has called it a career. Derrick spoke to LetsRun about his career, mistakes he's made, lessons he's learned, Shelby Houlihan, and how he'd improve the sport. *MB: The Exit Interview: Chris Derrick Retires From Professional Running

The odds are the Olympic team will consist of 3 of the "Big 4" of Rupp, Korir, Fauble and Ward, but here are 26 underdogs with a chance if 2 of the 4 falter. From 45-year old Bernard Lagat to 24-year old Jerrell Mock, meet those with "a chance."

Kosgei comes in as the defending champion after winning in 2018 in 2:18:35 and then winning London in 2:18:20. She is joined by Betsy Saina (2:22:56) and Mexico's Madai Perez (2:22:59). Chumba won Chicago in 2015, but will only be the fourth fastest in the field as Dubai champ Getaneh Molla (2:03:34) and runner-up Herpasa Negasa (2:03:40) lead the way along with previously announced Mo Farah. USA's Amy Cragg, Chris Derrick and Brogan Austin have all withdrawn.

We break down what it all means as we we get closer to the 2020 US Trials. Plus, why we think Berlin might be a better option. *MB: 2019 Chicago Marathon US field is out: Cragg, Derrick, Ritz Join Rupp & Hasay

Another top names announced include US marathon champs Brogan Austin and Emma Bates as well as Stephanie Bruce, Lindsay Flanagan, Chris Derrick, Diego Estrada and Parker Stinson.

Jonathan Gault also breaks down Chris Derrick's sub-2:10 and says that Eliud Kipchoge will slow down, eventually.

The unparalleled Eliud Kipchoge tops the marathon rankings yet again.

Last year a 40-year old man took top US honors in NY. Might a 43-year old running the first marathon of his life do it in 2018? That would be crazy. *MB: And the top American man in New York City will be? Read this and then give us your picks

Both fields are very deep as sthe men's side has Jake Robertson, Stanley Biwott, Stephen Sambu, Chris Derrick, Callum Hawkins, Shadrack Biwott, Lopez Lomong and more. The women are lead by 65:07 half-marathoner Caroline Kipkirui, NYC Half champ Buze Dirba, Emily Sisson and Gwen Jorgensen.

Also racing are Sally Kipyego, Betsy Saina, Buze Diriba and Mamitu Daska. On the men's side, Meb Keflezighi is racing as last year's winner Daniel Chebii leads the field with Stephen Sambu, Abdi Abdirahman, Chris Derrick and more.

Get ready - 2018's first big weekend of racing is here!! From Mo Farah's first race under new coach Gary Lough in Doha to the Great Edinburgh XCountry to Clayton Murphy's NOP debut to Molly Huddle vs. Jordan Hasay and the American record (and a loaded men's field) at the Houston Half Marathon, we preview it all. Huddle's coach Ray Treacy shares his insight with LRC and says "[Molly] is as prepared as she’s ever been for a half marathon."

Today in Chicago, Galen Rupp followed their lead and became the first American-born winner of the Chicago Marathon in 35 years by running a personal best of 2:09:18 to win over last year’s champ Abel Kirui of Kenya who was second in 2:09:48.

Diego Estrada, Luke Puskedra, Noah Droddy, Chris Derrick, Sam Chelanga and others are all racing.

Other top Americans include Luke Puskedra, Diego Estrada, Andrew Bumbalough, Sam Chelanga, Chris Derrick making his debut, Becky Wade and Joan Benoit Samuelson going for the first sub-3 hour marathon by a 60-year-old.

Only 1 US athlete has ever won the same event 9 straight years at USAs. Can Rupp be #2? *MB: 2017 USA 10k race is tmw night. Will Rupp win his 9th straight? And the 5k is less than 24 hours later