She won a silver medal at the inaugural World Championships in 1983 in the 4 × 100 m relay and competed in the 200 metres at the 1984 Olympic Games in Los Angeles.

Later that year, she competed at the World Championships in Helsinki, where she won a silver medal in the 4 x 100 metres relay, running the first leg.

Baptiste reached the 200 metres semi-finals at the 1984 Los Angeles Olympics, running a lifetime best of 22.86 secs.

In 1986, Baptiste won a Commonwealth Games gold medal in Edinburgh in the 4 × 100 m relay, along with Paula Dunn, Kathy Cook and Heather Oakes.

She won the AAAs National title at 200 metres in 1987 and competed that year at the World Championships in Rome as a member of the sprint relay squad.