Does Manning bear blame for Welker’s latest concussion?

When former Patriots receiver Wes Welker committed a much-publicized (and lamented) drop in Super Bowl XLVI, few blamed his quarterback for throwing a grossly inaccurate pass. Now that current Broncos receiver Wes Welker has sustained his third concussion in his last 10 games played, some are blaming his quarterback for throwing a ball to a…