The sexual-violence scandal at Baylor University that cost its celebrated football coach his job involved 17 women who reported sexual or domestic assaults involving 19 players, including four alleged gang rapes, since 2011, according to Baylor regents.

for failing to deal with sexual-violence allegations involving his squad, but provided only a vague description of the alleged improprieties at the time. Legions of fans and donors rallied to his cause.

Now,...