What do Ping Golf Clubs, Insight for Living with Dr. Chuck Swindoll, and Core Christianity all have in common? His name is Dr. Bill Maier. Clinical psychologist and veteran Christian broadcaster Dr. Bill Maier has enjoyed a fascinating career. He’s Dr. Chuck Swindoll’s announcer, co-hosts the popular Christian apologetic's program, "Core Christianity," and has been the voice for Ping Golf Clubs, Clorox, Nestle, and Sun Maid Raisins, among other products.