Tegenkamp called it a career yesterday and his career helped usher American distance running into a new era.

If you want to dominate your Boston office pool read this as we give you insight on just about everyone. Ritz is getting help from Greg Meyer and Hartmann, Tadese hopes to have figured out the marathon, Makau is ready, Tadese still looks great, not to mention Teg, Cabada and oh yeah a guy named Meb. Interviews and more.

For the first time in 31 years, an American enters Boston as the defending champion. If Meb can't repeat, can Ritz, Teg, Eggleston, Arciniaga, Cabada or anyone else from the US of A shock the world?

One of the busiest racing weekends of the year sees Ben True go for a three-peat at the 15K Champs while USA XC Laura Thweatt leads the women's field. In NYC, Molly Huddle faces Desiree Linden plus Sally Kipyego; Meb, Ritz and Teg take on Stephen Sambu and Juan Luis Barrios. Plus Jared Ward and the Halls run USA Marathon Champs as part of the LA Marathon on Sunday.

Stephen Sambu faces a field of top Americans, including Meb Keflezighi, Dathan Ritzenhein, Abdi Abdirahman, Matt Tegenkamp and, in their debuts, Chris Solinsky and Andrew Bumbalough.

Nike Oregon Project's Cam Levins had an off day and the rival Bowerman Track Club's Lopez Lomong and Ryan Hill were glad to pick up the slack going 1-2 in the men's 5000m. German Fernandez DNFd as he was having a terrible day and going to get lapped.

The race is the host of the US road 10K champs.

Mo Farah is a fierce competitor, Molly and Sally debut, it's all about 26.2 and some human decency from Matt Tegenkamp showing the Schumacher-Salazar rivarly only goes so far.

Geoffrey Mutai won. Mo Farah fell during the race and then passed out after it. Tegenkamp was the first American and Meb is fitter than ever.

Mo Farah vs Geoffrey Mutai and Matt Tegenkamp, Molly Huddle, and Sally Kipyego making their half-marathon debuts.

It's a Molly Huddle, Emily Infeld and Shalane Flanagan rematch  for $20,000. On the men's side, Matt Tegenkamp, Chris Solinsky, Abdi Abdirahman, Shadrack Biwott, Aaron Braun, Nick Arciniaga and Josphat Boit battle.

Race Results Weekly article on Tegenkamp's recovery from Chicago and attempt to win the USARC title.

LRC breaks down the 2013 Bank of America Chicago Marathon with eight quick takes on the historic men's race.

Dennis Kimetto ran 2:03:45 and Emmanuel Mutai was second in 2:03:52 in the first race ever with two sub 2:04s on a record eligible course. Dathan Ritzenhein was fifth to lead the Americans.