McClellin (undisclosed) was placed on injured reserve Monday, Mike Reiss of ESPN.com reports.
McClellin missed the majority of the preseason with an undisclosed injury and will now be sidelined for at least the first half of season. The six-year pro was a key contributor on special teams and select defensive packages for the Super Bowl champs last season, playing in 14 games and making four starts. In a corresponding move, the Patriots resigned running back Brandon Bolden - another key special teamer for the Patriots over the past few years.