Patriots place Koppen, Pryor on IR

The New England Patriots placed center Dan Koppen and defensive lineman Myron Pryor on injured reserve Wednesday.

Koppen broke his left ankle during New England's season-opening win over the Dolphins.

Originally drafted in the fifth round by the Patriots out of Boston College in 2003, Koppen had played in every game each of the previous three seasons.

Pryor (shoulder) has 35 tackles and one sack over 24 career games with the Patriots.

New England signed defensive back Phillip Adams and defensive lineman Landon Cohen to the 53-man roster.