In three years under Jim Harbaugh, the San Francisco 49ers are 37-12-1 in the regular season, a .755 winning percentage.Impressive enough.Perhaps even more notable, though, is the Niners' record immediately following a loss with Harbaugh as their head coach. They are 9-2 (.818) in such games. And after Sunday night's meltdown in the debut of Levi's Stadium, a 28-20 loss in which the 49ers blew leads of 17-0 and 20-7, they will have to call on some of that same resolve in the desert as they travel to take on the 2-0 Arizona Cardinals in a key early-season NFC West game.