Photo by Jorge Lemus/NurPhoto via Getty ImagesMichael Thorbjornsen has claimed a superb maiden win on the PGA Tour after triumphing at the Rocket Classic.On his 65th PGA Tour start, the 24-year-old secured his first win with a two-shot victory over fellow American Xander Schauffele.Detroit Golf Club played host to the tournament, where the champion carded four rounds under 70 to finish on 18-under.His immediate plans have now emerged following the title, with Thorbjornsen taking the opposite approach to recent fellow first-time winner Jackson Koivun.Michael Thorbjornsen doesnt follow Jackson Koivun after Rocket Classic winImmediately after winning the Rocket Classic, Thorbjornsen has decided to withdraw from this weeks event.He will not be making an appearance at the Wyndham Championship, which takes place at Sedgefield Country Club.Thorbjornsen, who is one of many withdrawals, has been replaced in the field for the next PGA Tour event by Justin Lower.Photo by Gregory Shamus/Getty ImagesIn stark contrast, Koivun decided to take on the Rocket Classic shortly after claiming his first win at the 3M Open.Hosted by TPC Twin Cities, the 21-year-old finished on 25-under to clinch a three-shot victory over Scottie Scheffler.After that stunning display, Koivun fell short of repeating his heroics at the Rocket Classic, where he finished in a tie for 31st.Cameron Young headlines Wyndham Championship fieldThorbjornsen has joined Kristoffer Reitan, Brendon Todd and Dan Brown in withdrawing from this weeks Wyndham Championship.And while many high-profile players are not in the field, it does include world number three Cameron Young.The American is also the defending champion at the tournament, having claimed his maiden PGA Tour win at the 2025 edition with a six-shot victory.Photo by Johnnie Izquierdo/Getty ImagesHe is joined this year by former world number one Justin Thomas and current PGA Championship champion Aaron Rai.Also playing at Sedgefield Country Club are the likes of Ben Griffin, Jordan Spieth, Patrick Cantlay and Jason Day, as well as rising star Koivun.Read more:Jackson Koivun has just shown everyone why he is destined to be a golfing superstar at the Rocket Classic