Daniel Romanchuk, at 20 years old, is the youngest man to win the race, and he also recorded the fastest time for an American: 1:21:36. He adds the title to a growing list, as he won the Chicago and New York races in 2018. 

Here's the video of his finish, from CBS Chicago:

He's a member of the University of Illinois Wheelchair Racing team, which also produced Paralympians Tatyana McFadden and Amanda McGrory. 
Photo from U.S. Paralympics Facebook page