The San Francisco 49ers have generally done a good job identifying which players to re-sign ahead of time.Patrick Willis, Vernon Davis, NaVorro Bowman and Joe Staley stand as examples from past seasons. Deciding against paying big money for other free agents -- Aubrayo Franklin comes to mind -- has also generally worked out well.NFC West OL by Guaranteed MoneySo, when the 49ers recently re-signed tackle Anthony Davis well before his contract was set to expire, the broader context suggests the team was probably making a wise move.