Jeff Ament fretlessbass March 15, 2017 Player Bios Tagged Tags: Jeff Ament Player bio, photos, videos, music, and more From Wikipedia.com (full Wiki link): Jeff Ament playing a fretless bass Jeff Ament playing an electric upright fretless bass Jeff Ament of Pearl Jam playing an electric upright fretless bass Jeff Ament of Pearl Jam playing an electric upright fretless bass