The Australian cricket, who raped a woman he found in his teammate's room, "jumped", was imprisoned for five years by an English court.
23 Hepburn was convicted of an attack he made during the first night of a sexual conquest, which he helped to establish on the WhatsApp group.
The former Worcestershire county all-rounder was told by a criminal prosecution that they were "fired" from the competition to sleep with most women before rape at his apartment in Portland Street, Worcester, in April 2017.
Jail Hepburn at Hereford Crown Court on Tuesday, Judge Jim Tindal told "immature" cricket he and former teammates agreed to "pathetic sexist games to collect as many sexual encounters".
He added: "You probably thought it was a graceful behavior at the time. “In fact, it was a nasty sexism.
"It made women worse and trivialized rape – a word that you personally threw lightly.
"Only now do you realize how seriously rape is."
His lawyer, Michelle Heeley QC, said her client had remorse.
In what the judge called a "brave" statement of impact on victims, woman Hepburn attacked her suffering as "evil" and "an abominable crime."
Judge Tindal praised her for providing evidence through two attempts and added, "I hope she can finally look into her future, which will be, as I am sure, clear."
The jury found that Hepburn had committed a rape offense earlier this month, but got rid of another rape involving the same victim.
Worcester Crown Court, a four-day trial, heard that a woman mistakenly thought she had sex with Hepburn's then-teammate Joe Clark after meeting him at a nightclub.
She told jurors that she had a consensual sex with England's Lions Clark, who left his bedroom in the morning to be sick in the bathroom where he fainted.