At some point, Kelly Slater is supposed to start looking his age. Apparently, 54 isn’t it. Fresh off a memorable wildcard appearance at the Tahiti Pro, the 11-time world champion resurfaced at Lower Trestles during Hurricane Marie’s south swell—and proceeded to remind everyone that retirement and irrelevance are two very different things. Firewire captured Slater during a raw session at pumping Lowers, where he was riding the Dan Mann-designed DRK. The footage shows vintage Slater: deep bottom turns, ridiculous positioning, lightning-fast direction changes and the sort of rail surfing that looks effortless until you remember he’s doing it at 54. Firewire shaper Dan Mann perhaps explained it best: “Kelly not thinking about the board is when he is free to fly. When he is flying, we all win.” Which raises an interesting question: Should Slater have received a wildcard into this week’s Lexus Trestles Pro? There’s certainly evidence for the prosecution.…