The Raiders placed Masterson (knee) on injured reserve Saturday.
Masterson (knee) has been ruled out ahead of Sunday's matchup against the Broncos, Paul Gutierrez of ESPN.com reports.
Masterson (knee) was a limited participant in Wednesday's practice, Paul Gutierrez of ESPN.com reports.
Masterson (concussion) has no injury designation ahead of Sunday's game against the Jets, Vincent Bonsignore of the Las Vegas Review-Journal reports.
Masterson (concussion) has been ruled out ahead of Sunday's game against Giants, Rachel Gossen of the Raiders' official site reports.
Masterson posted seven tackles (three solo), including one for loss, during Sunday's 37-34 loss to the 49ers.
Masterson recorded 10 tackles (six solo) in Saturday's 13-10 loss to the Steelers.
Masterson made nine tackles (four solo) on defense in Sunday's Week 15 win over New England.