Dan Koppen, a veteran center, agreed to a two-year, $6 million contract with the New England Patriots, according to the NFL Network and ESPN.com.

Koppen sustained a broken ankle in the season opener last September and missed the rest of the season.

REDSKINS: London Fletcher, a veteran free-agent linebacker, agreed to a two-year deal that keeps him in Washington.

Washington signed free-agent safety Tanard Jackson, who was released by Tampa Bay earlier this week after failing a physical.

RYAN LEAF, a former NFL quarterback, was formally charged in Helena, Mont., with four felonies on accusations he broke into an acquaintance’s home to steal prescription painkillers, then robbed a second home two days after being released from jail.

BRONCOS: Denver released cornerback Andre’ Goodman, a move that’s been expected since it signed free-agent cornerback Tracy Porter last month.

CHARGERS: San Diego signed free-agent tackle Mario Henderson.

TEXANS: Houston signed unrestricted free-agent linebacker Bradie James and re-signed linebacker Tim Dobbins.

COLTS: Indianapolis waived receiver Blair White, the latest move in rebuilding after a 2-14 season.

TITANS: Tennessee re-signed veteran defensive end Dave Ball.