How Much Has Each San Francisco 49ers Positional Unit Improved This Offseason?

The San Francisco 49ers were one play away from advancing to their seventh Super Bowl in 2013.  They’re in the prime of their championship window, as they work to keep their veterans potent for a few more seasons and slowly bring their young talent up to speed.

When you’re talking about a team that boasted 10 Pro Bowlers last season, there’s not a heck of a lot of room to improve at the top of the roster.  Rather, any improvement has to come at the bottom of the roster, enhancing depth and solidifying potential injury replacements and rotational talent.

Have the 49ers actually improved at these spots, or are they simply treading water?  Have they actually taken any steps backward i...

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