Australian Bowditch clinched the Texas Open by a single shot at the weekend and was one of the biggest winners when the latest rankings were published on Monday, climbing from 339th to 134th.
The 30-year-old produced a four-over 76 in his final round at the TPC San Antonio, but that was enough in tough conditions, as none of his nearest challengers threatened his eight-under 280.
The top 10 remains unchanged with the exception of Zach Johnson leapfrogging compatriot and namesake Dustin into ninth.
Tiger Woods remains in pole position, with Adam Scott and Henrik Stenson in second and third respectively.
Japan's Michio Matsumura birdied the last three holes for victory at the Indonesia PGA Championship and has climbed 109 places to 249th, while Kris Blanks' win at the Chitimacha Louisiana Open has seen him surge from 1,065th to 401st.