LONDON – The San Francisco 49ers roster is about to change.The 6-2 49ers -- who have won five straight games going into their bye week -- are poised to get much better. They have six players who are likely to come off various different injury/illness lists including linebacker Aldon Smith, receivers Mario Manningham and Michael Crabtree, cornerback Eric Wright, rookie defensive lineman Tank Carradine and rookie linebacker Nick Moody.The 49ers will have to subtract from the 53-man roster with each activation.