FC Tulsa jumped ahead in the 11th minute when Joaquin Rivas beat CJ Cochran with a low effort to the corner from 25 yards.
The Greens came inches from an equalizer in the 62nd minute when Aidan Daniels’ shot from the top of the box struck the bar and bounced down before being cleared to safety.
As OKC pressed forward looking for the equalizer, the hosts sealed the victory on the counterattack. Marlon was able to create space and score with a low strike from a tight angle to keep the Wrench in Tulsa for another season.
TUL: Rivas (Moloto), 11’
TUL: Marlon (Bourgeois), 82’
TUL: Jadama (Yello Card), 68’
OKC: Chavez (Yellow Card), 71’
OKC Starting XI: GK: CJ Cochran; D: Conor Donovan (c), Mitch Osmond, Lamar Batista (Deklan Wynne, 69’); M: Zach Ellis-Hayden, Tucker Stephenson (Seyi Adekoya, 88’), Hiroki Kurimoto, Brad Dunwell (Aidan Daniels, 45’); F: Jon Brown (Jaime Chavez, 69’), Arun Basuljevic, Villyan Bijev
Subs not used: Sam Howard, Mueng Sunday, Kodai Iida
TUL Starting XI: GK: Austin Wormell; D: Bradley Bourgeois (C), Modou Jadama, Johnny Fenwick, Matthew Sheldon; M: Lebo Moloto, Kembo Kibato (Ayagwa, 83’), Rodrigo da Costa (Coutinho, 83’); F: Dario Suarez (Flanagan, 88’), Joaquin Rivas, Jason Johnson (Marlon, 73’)
Subs not used: Gagliardi, Corrales, Garcia