Career
From 1991 to 1995, Rosner competed in the United States, playing for University of Alabama at Birmingham in National Collegiate Athletic Association Men"s Tennis Championship. He was an All-American on three occasions. Rosner entered into the Men"s Doubles draw of 13 Grand Slams but only twice made it past the first round.
In the 1999 Wimbledon Championships he went further, this time partnering countryman Chris Haggard.
The pair made the round of 16, after two straight sets victories, but then fell to Ellis Ferreira and Rick Leach. After he left the tour he became head coach of the tennis program at Birmingham–Southern College.
In 2011, he left Birmingham-Southern to become the Mountain Brook Country Club head tennis director Doubles: (11).