1998 Tyrrell driver Ricardo Rosset retired from racing after leaving the team at the end of the season, while his teammate, Toranosuke Takagi competed for Arrows in 1999, where he was joined by Jordan's test driver from the previous season, Pedro de la Rosa, who also made his debut at the first race of the season. Pedro Diniz left Arrows to sign for Sauber. Diniz' teammate from 1998, Mika Salo was left without a full-time drive for 1999, but he later served as an injury replacement for both Ricardo Zonta at BAR for three races, and Ferrari's Michael Schumacher for six races, scoring one second place and one third for Ferrari. Johnny Herbert, whose Sauber seat was taken by Diniz, joined Rubens Barrichello at Stewart. The two drivers who had filled Stewart's second seat in 1998 were both absent from the Formula One grid in 1999: Jan Magnussen moved to the American Le Mans Series, while Jos Verstappen became the test driver for the aborted Honda F1 project.