Jason Jeremy Freese (born January 12, 1975) is an American musician and multi-instrumentalist.[1][2] Since 2004, he has been the touring keyboard and saxophone player for the punk rock band Green Day.[2] Freese has performed on over 50 albums, mainly on saxophones and keyboards, including for artists Green Day, Dr. Dre, Pitbull, Avenged Sevenfold, Goo Goo Dolls, and Jewel.