James Harrison rips the NFL on social media!

Pittsburgh Steelers' linebacker James Harrison has never tested positive for a performance-enhancing drug in his entire NFL career. And yet, the league seems to believe he has something to hide. Harrison says he has been drug tested three times in just as many months. 

The 39-year-old questioned the randomness of these tests, and called them an insult to his intelligence in a recent Instagram post:

Harrison also posted more videos of him at the gym. This is just impressive.

Harrison said a few weeks ago that he really wants to win another Super Bowl, and added that he wants to prove anybody that doubts him wrong. He led the Steelers with five sacks last season and also became the team's all-time sack leader in 2016. And it is fair to believe he has no reason to slow down in 2017.