The NFL community was shocked to learn on Thursday that Pittsburgh Steelers star pass-rusher T.J. Watt had been hospitalized due to some sort of lung problem.

During Friday's edition of NFL Network's "Good Morning Football" program, league insider Tom Pelissero revealed the exact nature of Watt's issue.

Why exactly was T.J. Watt hospitalized?

"T.J. Watt came into the facility on Wednesday morning, which was actually a player's day off," Pelissero explained, per Ross McCorkle of Steelers Depot. "He was coming in for a lift and just felt like he was having some pain. He actually went through, did his lift, did his workout, then went for his normal treatment, was still having pain, and so they decided to get him checked out."

Following tests, the Steelers determined th

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