When Sandy is at the bar with Matt, Matt orders two shots of Patron. Sandy says he hasn't had tequila in "forever". However he had tequila, Patron specifically, when his fugitive ex-girlfriend Rebecca Bloom showed up in the middle of season 2, which was technically still the same year (2005).
When Marissa is at the beach with Johnny she asks where "Chili" is at. Johnny points out to a person wiping out on their surfboard but that person has blond hair, which does not match that of Chili's hair.