The Buffalo Sabres, although not making the biggest of splashes in free agency, are making improvements to the roster little by little.  The team has made a real push at getting bigger and tougher for the upcoming season.  Earlier acquisitions included the mountainous John Scott, tough-guy Steve Ott and Adam Pardy.  The newest player to sign with the team is Kevin Porter. Porter is a former fourth-round draft pick of the Phoenix Coyotes back in 2004.  He's 6 feet tall and about 190 pounds.  Last season, Porter played 35 games with the Colorado Avalanche, where he only recorded four goals and seven points.  The Sabres are hoping he can turn that season around and also add depth and toughness to the squad.