In 1999, she competed at the Pan American Games, where she helped the U.S. win a team silver medal, and the World Artistic Gymnastics Championships.

[1] At the 1996 U.S. Classic, Antolin won gold in the all-around and silver on floor; she also finished eighth on vault and seventh on uneven bars.

That year, she also competed at the China Cup, where she finished fourth in the all-around and won a bronze medal on uneven bars.

At the National Championships, she won a bronze medal on vault and finished 10th in the all-around, 11th on uneven bars, 12th on balance beam, and 16th on floor.

[1] At the 1998 American Classic, Antolin won silver on uneven bars and bronze on balance beam; she also finished sixth in the all-around, 10th on vault, and 20th on floor.

At the Grand Prix Zurich, also in Switzerland, she won a gold medal on uneven bars and finished fifth on balance beam and sixth on floor.

[2] In 2017, Antolin filed a lawsuit alleging that, during her gymnastics career, she had been sexually abused by the national team doctor, Larry Nassar.