The Men's 100 Butterfly event at the 2003 Pan American Games took place on August 13, 2003 (Day 12 of the Games). Benjamin Michaelson (USA) won the 100 butterfly in 53.04, bettering the Games record of 53.33.

Medalists

Records World Record 50.98 2003-07-26 Barcelona, Spain Pan Am Record 53.33 1999-08-03 Winnipeg, Canada

Results PlaceSwimmerHeatsFinalTimeRankTime 1 53.55 1 53.04 GR 2 54.34 5 53.28 3 54.23 3 53.44 NR 4 54.34 6 53.46 5 54.45 8 53.95 6 53.43 1 54.06 7 54.44 7 54.25 8 54.27 4 54.58 9 54.81 9 54.62 10 54.83 10 54.79 11 56.07 13 54.92 12 55.77 12 55.99 13 55.76 11 56.39 14 57.23 14 56.55 15 57.59 15 57.25 16 57.67 16 57.95 17 57.70 17 18 57.99 18 19 58.61 19 20 59.17 20 21 59.24 21 22 59.26 22 23 59.33 23 24 59.60 24 25 59.95 25

Notes

References usaswimming Records