The injuries just keep coming for NFL teams.

The Seattle Seahawks lost three-time Pro Bowl linebacker Chad Brown on Monday when he broke his left leg during practice. And Baltimore lost center Mike Flynn, who started all but one game since becoming a starter in 2000.

Coach Mike Holmgren said Brown would undergo surgery as soon as possible and was expected to miss at least four regular-season games. He was hurt getting his feet tangled with tight end Itula Mili during a practice drill.

Flynn broke his right collarbone early in the Ravens’ practice session. He was part of the unit that helped Jamal Lewis run for 2,066 yards last season, second highest total in NFL history.

New Orleans quarterback Aaron Brooks, who missed the first preseason game, probably will miss the third as well. He re-injured a ligament in the top of his thigh against the Packers. Brooks said he doubted he would do much this week in practice or in the game.