Seattle Sounders goalkeeper Kasey Keller believes the club is just 'one or two' players away from success.

The Sounders qualified for the MLS play-offs in just their first season in 2009 and despite losing some key players during the off-season, Keller is confident that only a few players are required to strengthen the squad.

"I think we were very happy with the core of the team that was built in that first year," Keller told Soccer 365. "We lost Seba (Sebastien Le Toux) but we know that Adrian, Chris, and Sigi are working hard to strengthen the squad. Not a whole lot needs to happen.

"What I was most proud of last season was that when we had suspension and injuries, guys stepped in and did a phenomenal job," Keller added. "We can continue to build on that but at the same time we have people challenging and ready to step up.

"If we can keep that core of 6-7 defenders healthy I feel very comfortable about our chances."