Growing up in Los Angeles, Steve Kerr came to appreciate one of the great Dodgers play-by-play announcer Vin Scully’s go-to axioms: “We’re all day-to-day.” It is a phrase the Warriors’ head coach figures sums up his current health status. After an offseason spent trying to find a solution to the chronic pain that has plagued him for more than two years, Kerr still experiences blinding headaches, dizziness and nausea — the nagging aftermath from a back surgery that resulted in a spinal-fluid leak. “I feel better,” Kerr said at the team’s Media Day. “I’m not 100 percent, but I’m on a good path. I’m confident I’ll be 100 percent at some point. I’d rather it be sooner than later. It’s been a long odyssey, as you know. It hasn’t been easy, but I’m lucky to have the support of, not only the players, but (general manager) Bob (Myers) and (majority owner) Joe (Lacob). They’ve been so supportive. I’m looking forward to the season. I’m excited.”