With Ian Walker leaving during the summer of 2001, Spurs were short of an experienced goalkeeper to cover for Neil Sullivan. Just four days before the season 2001-2002 began, Spurs acquired the services of the big Yank.
Having started his career with Colonial Meats and North Thurston High School and taken his goalkeeping skills on to Portland University, Keller first came to the attention of English supporters when he started to get rave reviews for his performances for Millwall, who had brought him to England from FC Portland. He was at the New Den for six years and was well liked by the Lions fans.
In August 1996, following Millwall's relegation to Division Two, he then moved to Leicester City (who had just been promoted to the Premier League) in a £1 million deal, where he made the number one jersey his own with a reputation for good shot stopping and safe handling. He was between the sticks when the Foxes played Spurs in the 1999 Worthington Cup Final. He gained European experience in the UEFA Cup, after their Worthington Cup wins and when he came to the end of his contract decided he would like to move abroad.
His summer 2000 free transfer to Spanish outfit, Rayo Vallecano appeared a strange one at the time, as they were newly promoted, but the side performed well in La Liga and he gained notoriety for being a good goalie - winning the best keeper of the year award in 2000-2001, despite losing out on the gloves to Lopetegui when Keller was injured and then couldn't get back in the side. However, at the end of his contract again, he sought to move on and held talks with interested parties appearing to be on his way to Turkey to play for Besiktas until Spurs came in for him and took him to White Hart Lane on a free transfer.
Not your average footballer, Kasey took a sociology course while at Millwall and is well-spoken when talking to the media. Is the most successful player to come from America to Europe with twice as many appearances as the next trans-Atlantic export. Hardly surprising when USA coach Clive Charles called him "the most focused player he had ever seen in the U.S."
At international level, he has played over 100 times for his country including World Cup finals appearances, two Olympics (captaining the 1996 team) and a number of awards in tournaments and within his own country. In the 1998 1-0 win for the US against Brazil, he made 10 superb saves and Brazilian striker Romario said, “That is the best performance by a goalkeeper I have ever seen.”
Missed out on 2002 World Cup appearances as he was kept out by Brad Friedel, but returned as first choice Spurs keeper at the start of the season 2002-03, putting Sullivan on the bench. Kasey played impressively and was needed, especially when Sully broke his thumb in training, leading to him becoming first choice keeper under Glenn Hoddle. He had a very good season, although the team flopped a bit after Christmas, but he showed his shot-stopping ability as the defence was sometimes left exposed by the leaky midfield.
Into 2003-04, Keller was once again No.1 keeper, with injury to Hirschfeld leaving only Rob Burch as cover, with Hoddle having sold Sullivan to Chelsea. He played every game for two consecutive seasons (92 games on the trot), but come the summer of 2004 and the arrival of new Head Coach Jacques Santini, Paul Robinson, the signing made by David Pleat, took the gloves and Keller was consigned to the bench. He went on loan to Southampton, where he stood in for Antti Niemi and played four games for the Saints.
Obviously, this displeased Keller and things did not improve when Santini departed and Martin Jol took control of the first team. A spell on loan at SCBC was perhaps the beginning of the end and in the January transfer window, having been allowed to leave on a free transfer, he joined Christian Ziege at Borussia Moenchengladbach. Had a good run to the end of the season, keeping his side in the Bundesliga.
Helped the USA to his fourth finals in 2006 by keeping a clean sheet for 507 minutes during qualification.
In 2006-07, Keller was chosen by his team-mates to be captain of the side, but after that season, in August 2007, the keeper returned to England, signing as cover for Fulham's injured first choice keeper Antti Niemi (again !). While he was out injured for a spell from October 2007, he returned towards the end of the campaign to help keep Fulham in the Premier League with a last day win. However, he was released by the West London club at the end of the season.
Joined Seattle Sounders in the MLS in August 2008 and set a new record for the MLS of 457 minutes without letting a goal past him from the start of a season.
Retired from playing in October 2011 in front of a record Sounders 64,000+ crowd, but has stayed with the club as their official announcer at the stadium.