LOUISVILLE, Ky. — Several bands are putting together a benefit concert to help beloved local musician and radio DJ with his medical expenses. Gavin Caster was diagnosed with prostate cancer and recently had to undergo surgery. The Gypsy Stone Kings is one of the bands taking part in the benefit show, as well as hosting it. In addition to helping with his medical expenses, the bands want to help raise awareness about prostate cancer, which is the most diagnosed cancer among males. Gavin’s GoFundMe has raised nearly $6,000 of a $26,250 goal. To help with Gavin's GoFundMe, click here.