<p> The San Diego Chargers cut center Nick McDonald with a non-football injury designation.</p> <p> McDonald is a former Green Bay Packers undrafted free agent from Grand Valley State.</p> <p> McDonald has also played for the New England Patriots.</p> <p> He signed with the Chargers in January.</p> <p> Follow me on Twitter: <a href="http://www.twitter.com/RavensInsider">@RavensInsider</a></p> <p> Aaron Wilson covers the Ravens for The Baltimore Sun</p>