Steelers' Harrison complains about yet another 'random' drug test

Pittsburgh Steelers linebacker James Harrison leads his team in sacks at age 38, which seems to have sparked suspicion among NFL drug testers.

Harrison shared a picture on Instagram of a letter he received from the NFL on Thursday, requesting what he claims is his "sixth or seventh random (drug) test this year" - while claiming some teammates haven't been tested all season.

Harrison's late-career success has prompted critics to suggest he must be aided by performance-enhancing drugs, but that doesn't seem to be the case considering how frequently he's tested.

To what can we attribute Harrison's unusual production at such advanced age, then? Perhaps it's simply that Harrison takes better care of his body than everyone else. He's constantly posting videos on Instagram of his intense workouts and recovery: