Washington Nationals president Stan Kasten resigned Thursday, according to sources. There was no immediate reason given for his resignation. He will remain through the end of the season.

Kasten, 58, had been the Nationals' president since 2006 and prior to that he was president of the Atlanta Braves. Kasten was one of the key architects of the Braves' run of success that resulted in 14 consecutive division titles and the 1995 World Series championship.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.