NFL admits officials, replay assistant screwed up on 49ers fumble

During the first quarter of Sunday’s 49ers-Patriots game, San Francisco’s Colin Kaepernick hit Delanie Walker with a pass, and New England’s Steve Gregory hit Walker just as he grabbed the ball, knocking it loose. Aqib Talib picked the ball up, and the officials ruled it a fumble recovered by the Patriots. One problem: Walker never…