At age 33, Anquan Boldin is no young, pass-catching phenom in the NFL. He's been around 11 seasons and has 857 regular-season catches.But when the 49ers re-signed their wide receiver to a two-year deal this week, they invested in a player they believe can pay big dividends in multiple areas.No. 1, of course, is as a receiver. Because his game has never been about outrunning defensive back, but outfighting them, Boldin's loss of a half-step or so over his career isn't that concerning.After all, last season Boldin led the Niners with 85 catches for 1,179 yards and had seven TD catches. His yardage total was the highest it's been since 2006 with the Arizona Cardinals. And, Boldin put up those numbers even while he was the only obvious go-to receiver in the lineup, with Michael Crabtree out with an injury for most of the season. Watch Jim Harbaugh Drain Half-Court Shot -- In KhakisBut aside from his pass-catching skills, the Niners are investing in Boldin's intangibles: his drive, his leadership, his work ethic and the knowledge he can bring to his younger teammates.The 49ers had acknowledged that re-signing Boldin was their No. 1 offseason priority. So, that's one mission...