The Jamaican ran his fastest time of the year to win in 9.81 seconds.
Hurkacz had to come from a set behind against Ruud, while Pablo Carreno-Busta prevailed in a three-hour grind against Daniel Evans.
The British number two was eventually outlasted 7-5 6-7 6-2 across two hours and 58 minutes.
First-round draft pick Kenny Pickett led the Steelers on a 43-yard drive, resulting in the game-winning touchdown in the final seconds.