This means he's facing nine years in federal prison.
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The plea deal is part of a global agreement with the four states where he is facing similar charges -- a total of nine drugged rape charges.
His suspected string of serial rapes ended in January 2014, when he was arrested on a suspicion of rape in Los Angeles. This after two women say they were drugged and rapped after meeting him at a West Hollywood night club.
At the time of his first arrest, he had 20 zolpidem pills in his possession, which is a sleep drug known by its brand name Ambien.
Sharper had a 14-year career in the NFL playing with the New Orleans Saints, Green Bay Packers and Minnesota Vikings.
In addition to the charges in California and Arizona, he faces two rape charges in Las Vegas and three in New Orleans, where he is expected to enter guilty pleas within the next month.
In the deal, all nine years will be served concurrently in federal prison.
Sharper has been fined more than $10,000 in California and must register as a convicted sex offender for life.
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