Sometimes when retirement folks get to reminiscing about the old days in the fight game, there’s a little gleam in the eye that basically says: And make no mistake, young fella, I can still do it. For Chuck Liddell and Tito Ortiz, that feisty gleam was enough for boxing’s Golden Boy to get involved with MMA, an early bird special of a bout that promises to cash in on an unresolved rivalry spanning back some back 14 years. The date and venue weren’t immediately provided, but a 15 percent discount is available to anyone with an AARP card.