Jay Dee Bentley is the bassist and co-founding member of the punk rock group Bad Religion. He has played with the band through its whole existence with a small break between 1983 and 1985. Along with vocalist Greg Graffin, Bentley has appeared on nearly all of Bad Religion's studio albums, with the sole exception being their second album Into the Unknown (1983).

Bad Religion is an American punk rock band, formed in Los Angeles, California, in 1980. The band's lyrics cover topics related to religion, politics, society, the media and science. Musically, they are noted for their melodic sensibilities and extensive use of three-part vocal harmonies. The band has experienced multiple line-up changes, with singer Greg Graffin being the band's only constant member, though fellow founding members Jay Bentley and Brett Gurewitz have also been with the band for most of their history while guitarist Brian Baker has been a member of the group since 1994. Guitarist Mike Dimkich and drummer Jamie Miller have been members of the band since 2013 and 2015 respectively. To date, Bad Religion has released seventeen studio albums, two live albums, three compilation albums, three EPs, and two live DVDs. They are considered to be one of the best-selling punk rock acts of all time, having sold over five million albums worldwide.