Updated

SEATTLE (Reuters) - Goalkeeper Kasey Keller signed a new one-year contract with Major League Soccer's Seattle Sounders on Friday, then indicated his 20th season as a professional would be his last.

"In these two years with the Sounders, I've been very happy with the form of myself and the team," Keller, 41, told the Sounders' website (www.sounderfc.com).

"Throw in the fact that Portland and Vancouver are coming into the league, and there was no question that I wanted to play one last season.

Before signing with Seattle in 2008, Keller spent much of his career in Europe's top leagues, including the English Premier League, Spain's La Liga and Germany's Bundesliga.

Keller has been a member of four U.S. World Cup squads and has been capped 102 times, a record for a U.S. keeper.

(Writing by Steve Keating in Toronto, Editing by Stephen Wood)