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Roberson (6-1) made a huge impression on UFC President Dana White with a stunning knockout on the Contender Series, using elbows to put away Ryan Spann only 15 seconds into Round 1.
The rangy middleweight took a massive step up in competition after the Spann knockout, losing by submission to seasoned promotional veteran Cesar Ferreira at UFC 224.
Marshman (22-7) has remained inconsistent throughout his UFC run, having not fought since a submission loss last year. Prior to that, Marshman fell victim to a body kick TKO against Thiago Santos, with a decision victory over Ryan Janes in between those two losses.
UFC 230 takes place at the famous Madison Square Garden and features a blockbuster lightweight tilt between Dustin Poirier and Nate Diaz.