She represented the United States as a 16-year-old at the 1968 Summer Olympics in Mexico City, where she received a bronze medal for her third-place performance in the 100-meter butterfly, finishing behind Australian Lyn McClements and fellow American Ellie Daniel.
Lyn Hejinian | Lyn McClements | Lyn | Lyn St. James | SFK Lyn | Lyn Yvonne Abramson | Lyn Fotball | Lyn (Src family Kinase) | Lyn Nofziger | Lyn Lifshin | Lyn Larsen | Jodi Lyn O'Keefe | Jaime Lyn Bauer | Catherine McClements | Carly Lyn | Tara Lyn Hart | Lyn Swinburne | Lyn Jones | Lyn Hagan | Lyn (Gjøvik) | Lyn Collins | Lyn Allison | LYN | Jennifer Lyn Jackson |
Coming from Queensland, Steinbeck combined with Lynne Watson, Lyn McClements and Judy Playfair to register a silver medal in the 4x100m medley relay, trailing the Americans home by 1.7s.
Coming from New South Wales, Playfair combined with Janet Steinbeck, Lyn McClements and Lynne Watson to register a silver medal in the 4x100m medley relay, trailing the Americans home by 1.7s.
Coming from Western Australia, Watson combined with Janet Steinbeck, Lyn McClements and Judy Playfair to register a silver medal in the 4x100m medley relay, trailing the Americans home by 1.7s.