At the 2004 Summer Olympics in Athens, Mubah swam for the second time in the 50 m freestyle. As part of an Olympic Solidarity program, he received a Universality place from FINA in an entry time of 27.51. He challenged seven other swimmers in heat three, including 16-year-old Chris Hackel of Mauritius. He saved a seventh spot over Uganda's Edgar Luberenga by six hundredths of a second (0.06), outside his entry time of 27.71. Mubah failed to advance into the semifinals, as he managed to repeat the same position from his first Olympic stint in the preliminaries.