After undergoing offseason surgery to fix a hampered shoulder, Vollmer is headed to the PUP/injured reserve list to begin the year with a hip injury suffered during training camp.
Lewis - who is slated to undergo what is being described as a "relatively minor" procedure on his left knee, figures to be sidelined for about 8-10 more weeks, the Boston Herald reports. Although there's no word on how much time he'll miss, it's hard to imagine Lewis would be ready for the start of the season.
He has not played in a game since November 8 when he tore his left ACL in the Patriots week 7 win over the Washington Redskins. But Lewis has rarely been healthy in his National Football League career.More news: Gawker to shut down after almost 14 years
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Whatever Mason's role, losing both him and Vollmer for significant time puts some stress on an offensive line that wasn't that great to begin with. Guard Shaq Mason, who started 10 games past year, has a broken hand and his timetable to return is uncertain according to McBride.
The Patriots will be without quarterback Tom Brady for the first four games this season.