Just as they did last year, the 49ers will go into the NFL draft with a deep roster and a boatload of picks.The 49ers will have 13 selections, including a first-rounder, two second-round picks and three in the third round.Because they know they won't be able to find a home for 13 rookies on their 2014 roster, the Niners will be able to do what they did last season: use extra picks to trade up for impact players, trade for future selections or select "redshirt" players.For the Niners in 2013, there were two such "redshirt" picks – players who, as in college situations, were expected to sit out the year but contribute later. One was former South Carolina running back Marcus Lattimore. The other was former Florida State defensive end Tank Carradine.Both sat out all of 2013 with injuries, and both should be able to contribute greatly in 2014, giving the 49ers an infusion of first-round-type talent.Carradine, a second-round pick, suffered an ACL tear in his final season with the Seminoles. Lattimore, a fourth-round choice, suffered a horrific injury in a game that tore two knee ligaments and dislocated his kneecap. Niners head coach Jim Harbaugh expects both to compete for...