From Globesports.com:

PITTSBURGH — Free agent forward Matt Cooke signed a two-year contract with Pittsburgh on Saturday, replacing Jarkko Ruutu as the Penguins’ primary agitator.

The Penguins also offered Ruutu a two-year contract earlier this week but he signed a three-year deal with the Ottawa Senators after free agent bidding began.

The five-foot-11, 205-pound Cooke had 10 goals, 13 assists and 91 penalty minutes in 78 games with the Vancouver Canucks and Washington Capitals last season. Cooke, a left winger who usually plays on the penalty-killing unit, was acquired by Washington at the trade deadline for left winger Matt Pettinger.