He was a regular first-choice keeper at Schalke until he lost his starting position to youngster Manuel Neuer in late 2006.

[7][8] Ahead of the 2010–11 season, Rost competed with the newly signed Jaroslav Drobný for the spot as number one goalkeeper.

On 13 July 2011, German daily tabloid Bild reported that Rost would be joining New York Red Bulls in Major League Soccer.

[13] Rost was part of the East Germany national team at the 1989 FIFA U-16 World Championship, appearing in four matches.

[14] Rost earned a total of four caps with the Germany national team, making his debut against the United States in 2002.