Albert Haynesworth misses practice

FOXBOROUGH, Mass. -- On the same day the New England Patriots bulked up their defensive line by adding three new faces to the field, defensive lineman Albert Haynesworth missed his third straight practice Monday at Gillette Stadium.

Veteran defensive linemen Andre Carter and Gerard Warren were in full pads for the Patriots' lone session of the day, while Shaun Ellis joined the team in a T-shirt and shorts for the session, while also spending some of his time doing work with the strength and conditioning staff inside the team's fieldhouse. All three players officially inked free-agent deals with the Patriots on Monday, while the team released safety Brandon McGowan.

It remains unclear -- injury or otherwise -- why Haynesworth has not been on the field. Patriots coach Bill Belichick did not address his absence Monday, but Haynesworth first missed Friday's practice and has not been spotted since (the Patriots had Sunday off).

Also not spotted at Monday's practice were defensive lineman Mike Wright, linebacker Brandon Spikes, center/guard Ryan Wendell and running back Eric Kettani. A camp-high 12 players were in shorts and T-shirts doing rehab work during the session: Running backs Kevin Faulk (active/PUP) and Shane Vereen; wide receiver Brandon Tate; offensive linemen Matt Light (active/PUP) and Marcus Cannon (active/NFI); defensive linemen Ellis, Ron Brace (active/PUP), and Brandon Deaderick (active/PUP); linebacker/safety Josh Barrett; cornerback Ras-I Dowling; and safeties James Sanders and Ross Ventrone.

Tight end Rob Gronkowski left the field midway through Monday's rain-soaked session accompanied by members of the team's training staff. It was unclear what injury, if any, Gronkowski suffered, but he left the field under his own power.

Later, offensive lineman Dan Connolly suffered a right elbow injury and did not return to action, nor did offensive lineman Chris Morris, who appeared to suffer a left ankle injury during offensive vs. defensive line blocking drills. Finally, guard Logan Mankins looked sluggish in between his reps during the final drills of the session, frequently taking an extended knee and staying behind the rest of the offensive line group as they moved to their next drill.

Chris Forsberg is a columnist and reporter for ESPNBoston.com. ESPNBoston.com's Mike Rodak contributed to this report.