While both took to the podiums in London this week to receive medal, 18-year-old Aly Raisman’s Olympic star was rising as 36-year-old swimmer Jason Lezak’s appeared to be setting.Raisman, of Needham, Mass., helped Team USA take the women’s team...

Four-time gold medalist Jason Lezak, competing in likely what is his final Olympics, helped the American swim team qualify for the 4x100-meter freestyle relay finals. Lezak swam in the morning preliminaries on Sunday but did not compete that evening in...