Romanchuk is the youngest winner of the race at 20 years, eight months and 12 days and is the first American winner since Jim Knaub in 1993. He finished three minutes ahead of Japan's Masazumi Soejima, who was second in 1:24:30. Marcel Hug was third, coming in at 1:26:42.
Romanchuk's victory breaks up the recent dominance of Hug and Ernst van Dyk, who between them have 14 Boston Marathon victories. Hug had won the previous four Boston races.
Tatyana McFadden, an Atholton graduate and five-time Boston Marathon champion, finished second in the women’s wheelchair division despite flipping over early in the race. McFadden crossed the finish line in 1:41:35, almost seven minutes behind winner Manuela Schar.
McFadden, 29, tweeted that she “fell on the train tracks today due to a wet first half of the race.”
What a @bostonmarathon race today! I fell on the train tracks today due to a wet first half of the race but this girl got right back up! Thank you to the amazing crowds and family for the support today. Went from 6th place to 2nd place! I’m ecstatic! Can’t wait for next year 💙💛 pic.twitter.com/AwiwGZYfrP
Schar, meanwhile, is on her way to a sweep of the World Marathon Major women's wheelchair races.
Schar won Boston for the second time Monday, finishing in 1:34:19 with no one else in sight. She is already the defending champion in Berlin, Chicago, New York and Tokyo. If she wins in London in two weeks, she will have swept the series.