Anderson Silva has become the most USADA tested UFC fighter of the 2016 calendar year (so far).
According to the USADA testing database, the former middleweight champion and one of the greatest fighters of all time has been tested a total of 15 times this year alone. Silva holds the longest title streak in UFC history, which ended in 2013 after 2,457 days, with 16 consecutive wins and 10 title defenses.
He has previously been flagged for PED's once before during his UFC career, failing a pre-fight test overseen by the Nevada State Athletic Commission ahead of UFC 183. Silva tested positive for anabolic steroids and traces of endogenous testosterone. He has not tested positive for any banned substances since then.
Silva has fought twice so far in 2016, first when he lost a controversial fight to current middleweight champ Michael Bisping, and most recently when he filled in for Jon Jones at #UFC200 on just two days notice.
For comparison, featherweight champion Conor McGregor, who has also fought twice in 2016, has been tested only eight times. Compare Silva's test numbers to other top fighters in the UFC:
Silva is not currently scheduled for any fights for the remaining year, although there are still several PPV cards to go before 2016 ends.