This was about the time last offseason when the San Francisco 49ers added running back Brandon Jacobs in free agency.Around the NFC West: March 26, 2013The signing got our attention because Jacobs was a relatively big-name player coming off a Super Bowl season, and he improved the 49ers' depth in the backfield before San Francisco used a second-round draft choice for LaMichael James.I'm circling back to that signing because Jacobs was also 29 years old at the time.