http://www.nfl.com/news/story/09000...nd-across-division?module=HP11_content_stream San Diego Chargers Needs: NT, OLB, SS, OG Quarterback Philip Rivers lost his main big-play target in Vincent Jackson, but the team still has Malcom Floyd, tight end Antonio Gates and promising second-year receiver Vincent Brown. And they also acquired free agents Robert Meachem and Eddie Royal to help out. The Chargers released left tackle Marcus McNeill due to his injury history, while they re-signed Jared Gaither, who took over for McNeill when he went on injured reserve last season. But San Diego should seek more depth behind both tackle spots. Tyronne Green has been a part-time starter at left guard the past two seasons, but might also see some competition for that spot. The team needs more help on the other side of the ball, as they try to improve their 22nd-ranked scoring defense from 2011. Free-agent nose tackle Antonio Garay might not return, so finding a run stuffer in the middle to rotate with Cam Thomas would be beneficial. Linebacker Antwan Barnes was a pass-rushing force last fall (11 sacks), but adding former Ravens starter Jarret Johnson might point to other changes at the position. Strong safety is another need position, as Steve Gregory was signed by the New England Patriots and free-agent acquisition Atari Bigby is a better reserve/special teams player.