Boston Marathon 2014 Mens race winner Posted on April 22, 2014 Back Bay business receipts go up during 2014 Marathon weekend 620 × 349 Boston Marathin 2014 winner Meb Keflezighi (USA) pulls away to become the first American champion since 1983. Boston Marathon 2014 winnder Meb Keflezighi (USA) pulls away to become the first American champion since 1983.