With his 29th career 450SX Class win, Ryan Dungey moved into sole possession of sixth on the all-time wins list.
Dungey extended his all-time record podium streak to 29 races.
Dungey is one win away from equaling the career best season wins total he set last year. He has recorded 15 victories the past two seasons after earning 14 career wins during his first five seasons of 450SX Class competition.
For the first time this season Ken Roczen failed to win a race after starting inside the top two.
Roczen now has 22 career podium finishes in 43 career starts, meaning he's been on the box in more than half of the 450SX Class races he's entered.
After he recorded back-to-back finishes for the first time in his career two races ago, Jason Anderson now has a three-race podium streak for the first time in his career.
Chad Reed looks to reach another milestone in his legendary career by making his 200th career 450SX Class start in St. Louis. He would join Mike LaRocco and Kevin Windham as the only riders in history to break the 200-start barrier, and would be the first international rider to do so.
Aaron Plessinger became the third 250SX Class rider this season to earn his first career win, but is first to do so in the Eastern Regional Championship.
Plessinger became the first graduate of the AMSOIL Arenacross Ricky Carmichael's Road to Supercross to win a Monster Energy Supercross Main Event. He was also the first Road to Supercross rider to earn an overall win in AMSOIL Arenacross.
The Eastern Regional Championship has five different winners in the first five races for the first time in history. This feat has been achieved just once before in the Western Regional Championship, during the 2000 season.
St. Louis could bring a slew of Regional Championship milestones for Malcolm Stewart as he will be in search of making his 45th career start and looking to earn his 10th career podium, 20th top five, and 30th top 10.
Gannon Audette earned his first career podium finish in his debut outing for Monster Energy/Pro Circuit/Kawasaki. He is riding as a substitute, filling the vacancy left by an injured Arnaud Tonus.