"Lesnar's one-year period of ineligibility began on July 15, 2016, the date on which he was provisionally suspended by USADA, and is identical in length to the sanction imposed by the Nevada State Athletic Commission (NSAC) on December 15, 2016. In addition, the NSAC overturned Lesnar's victory at UFC 200 to a no-contest."
In December, Lesnar was suspended for one year by the Nevada State Athletic Commission and also fined $NZ357,000 for the infraction.
USADA ultimately matched that suspension, with Lesnar's date of ineligibility beginning on July 15, 2016, which means the former heavyweight champion would be able to return to fighting as early as July 15, 2017, if he decides to compete again.
Lesnar has made no clear indication on whether or not he will take another fight in the UFC or just continue his career with the WWE, where he currently performs as a professional wrestler.
Unless he officially retires during the ban, he is required to remain in USADA's drug testing pool. Should he retire, the ban is frozen and still applicable should he announce a comeback, while he would also need to re-enter the drug testing pool.