With Garoppolo at the helm, San Francisco is undefeated (4-0) and has defeated two playoff contenders in back-to-back weeks. Jimmy G has compiled 1,268 yards, completed 69 percent of his passes and thrown five touchdowns in five games and four starts as a 49er. He led a game-winning fourth-quarter drive in last week's victory and got out ahead quickly in San Francisco's win this week. And the Niners are doing this with a motley crew of receivers -- Marquise Goodwin, Trent Taylor, Kendrick Bourne -- and a first-year regime.