Wochit News - Colin Kaepernick had a hard time on Sunday against the Green Bay Packers, and the beleaguered 49ers quarterback heard all about it â€" from booing fans at Levi's Stadium, and from Packers linebacker Clay Matthews.Fox TV mics picked up sound of Matthews taunting Kaepernick by saying: “You ain't Russell Wilson, bro.”It happened during the fourth quarter of Sunday's 17-3 win by the Packers.