Steelers star T.J. Watt was released from the hospital on Friday after suffering a "partially" collapsed lung during treatment, his brother J.J. Watt said.

In an update posted to social media, J.J. Watt said T.J. Watt had successful surgery to stabilize and repair a "partially" collapsed lung. It happened during a dry needling treatment, which uses needles to help relieve pain, at the facility on Wednesday, J.J. Watt said. 

At practice Friday afternoon, Steelers head coach Mike Tomlin confirmed T.J. Watt had been released from the hospital. While NFL insider Ian Rappoport's sources report that T.J. Watt will play again this season, Tomlin said he's out for Monday night's game against the Miami Dolphins at Acrisure Stadium. 

"He's at home resting comfortably," Tomlin said. "And so that's good news from a medical standpoint, but from a participation standpoint, he'll be described as out this night for Monday night."

T.J. Watt's wife, Dani Watt, also posted an update to social media on Friday, saying it had been "a very long hard couple of days." She thanked people for their love and support and said, "praise God for the amazing medical teams at both hospitals!"

The Steelers announced on Thursday that T.J. Watt was at a hospital for further medical evaluation of his lungs after experiencing discomfort at the practice facility the day before. 

This season, Watt has 20 solo tackles, 7 sacks, three forced fumbles and one interception. His presence is key for the Steelers' defense, which struggles when Watt misses time due to injury. 

J.J. Watt played 12 years in the NFL, mostly with the Houston Texans.