If the San Francisco 49ers want to add a veteran presence at cornerback in light of the Chris Culliver arrest, they might want to act fast.Carlos Rogers, who the 49ers cut earlier this offseason, signed with the Oakland Raiders on Monday night. The 49ers did not completely close the door on bringing back Rogers, according to a league source, but they didn't make much of a move toward doing so before he signed with the Raiders.The top veteran available cornerback on the market, Champ Bailey, is taking an undisclosed visit Monday, according the source.