Complex sentence: Kellner has been ranked No.1 in men's foil in the U.S. He had podium finishes in World Cups for several season in a row and won the gold, both team and individual, at the 2003 Pan American Games.
Split into simpler sentences: Kellner has been ranked No.1 in men's foil in the U.S. He had podium finishes in World Cups for several season in a row. He also won gold medals, both team and individual, at the 2003 Pan American Games.