The New England Patriots were missing pretty much their entire 2015 offensive line in the first open practice of 2016. Left tackle Nate Solder wasn't there, and neither was right tackle Sebastian Vollmer. The guard trio of Josh Kline, Shaq Mason, and Tre Jackson were not present.
Swing tackle Marcus Cannon was not reported missing (insert your own jokes here), and both centers Bryan Stork and David Andrews practiced- and both ESPN's Mike Reiss and the Herald's Jeff Howe believe that Stork and Andrews have an equal shot of winning the starting role.