The Ravens will release veteran wide receiver Derrick Mason once allowed to under the NFL calender. According to sources, Baltimore will also let go running back Willis McGahee and tight end Todd Heap. The Ravens could also let defensive tackle Kelly Gregg go. "It's a little bittersweet," Mason said. "I understand the business of football, and I understand what has to be done in the business of football. It was good while I was there. I can't hang my head down. I think I did everything above and beyond what they asked me to do when I came in there six years ago. And I think everybody in that building can attest to that. If last year truly was my last year in a Ravens uniform, then I've enjoyed every bit of it."