Ryan Martinie (Also known as "RyKnow", "Ru-d" and "RDM") is an American bassist, best known for being the bass player for alternative metal band Mudvayne. He is well known for his unique playing style and complex basslines. He is widely considered as one of the premiere bassists of today. He has been with the band since 1998. Ryan and Matt McDonough form a strong partnership, which is considered as one of the most skillful rhythm sections in metal.