Yes and No. You may compete in amateur divisions at A, B, and C Tier events if your player rating falls within the guidelines: http://www.pdga.com/documents/divisions-ratings-points-factors However, you are now classified as a Professional with the PDGA and are ineligible to compete in Amateur Majors such as the US Amateur Disc Golf Championship and Am Worlds.

*Please keep in mind that you may accept prizes in lieu of cash in a Professional division and remain an Amateur.