Ravens wide receiver Derrick Mason could miss the start of the team's training camp as he recovers from shoulder surgery. Despite the possibilty of missing time, Mason is optimistic that he'll be ready for the start of the 2009 season. "I guarantee I'll be ready by the first game, that's all I can say," Mason said Sunday, the final day of the team's minicamp. "Everything else, we'll play it by ear." Mason had surgery to repair his scapula and the labrum in his left shoulder in February.