Ronald Jay Blumenthal (born September 25, 1969), better known by his stage name Ron "Bumblefoot" Thal or just simply as Bumblefoot, is an American guitarist, songwriter, and producer. He adopted his nickname from the bacterial infection of the same name, which he learned about while helping his wife study for her veterinary exams. The name went from being just the name of an album, to the name of a record label, to a band name, to eventually his name as a solo artist. He was one of two lead guitarists in Guns N' Roses from 2006 until 2014 and performed on their sixth studio album Chinese Democracy. He is currently the guitarist for the supergroup Sons of Apollo and also guitarist and vocalist for the band Asia, having joined in 2019.
Since the early 1990s, he has released 10 CDs and a live DVD. He has appeared as a guest performer on other albums and on numerous compilation CDs. He has been the cover feature of GitarPlus magazine in Indonesia and has been featured in several foreign guitar magazines, as well as the subject of many print, radio and web interviews. Over the past twenty years, he has also worked with numerous bands and artists as producer, engineer, writer, arranger, and performer. He also writes TV jingles, theme songs, and background music.