HOUSTON - J.J. Watt broke his left leg on Sunday night against the Kansas City Chiefs, leaving the Houston Texans without one of their biggest stars for the second straight season.
The team announced that he sustained a tibial plateau fracture.
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The three-time Defensive Player of the Year returned this season after missing the last 13 games of last season after his second back surgery. He played every game in his first five seasons in the NFL before his injury last year.
Texans linebacker Whitney Mercilus was also injured in the first quarter and was ruled out with a chest injury. Mercilus will also miss the remainder of the 2017 season.
He took to Twitter thanking his fans and looking toward the future.
"Thank you all for your unwavering love and support! Your messages have been encouraging and inspirational and I look forward to returning next season better and stronger than ever!"
Thank you all for your unwavering love and support! Your messages have been encouraging and inspirational and ... https://t.co/18qi9LHLSX pic.twitter.com/4zTSFKEkEs — Whitney Mercilus (@Merci380) October 10, 2017
"Two good players obviously, great players. We feel terrible for them individually, personally. It's tough to put in all the work that they put in, pour their hearts and souls into the thing and then to have their seasons cut short because of an injury, it's tough," Texans head coach Bill O'Brien said.
Watt expressed his devastation on Twitter Monday saying: "I can't sugarcoat it, I am devastated. All I want to do is be out there on that field for my teammates and this city. I'm sorry."
I can't sugarcoat it, I am devastated.
All I want to do is be out there on that field for my teammates and this city.
I'm sorry. — JJ Watt (@JJWatt) October 9, 2017
Injuries are nothing new to the Texans defense. They were without Jadeveon Clowney for most of the 2014 and 2015 seasons, then without Watt in 2016.
This season was supposed to be the first full season with both of the Texans top two defensive guys in the front 7. Instead, with Watt and Mercilus now out, the defense will have to continue to rely on the "next man up" mentality that they did so well with last season.
"This football team understands that it is the next man up philosophy. It's going to take an effort by a lot of different people to fill those roles. They're not canceling the season and we're looking forward to the rest of the season. We feel like we have a good football team. We're looking forward to getting ready for Cleveland," O'Brien said.
"You don't replace J.J. Watt or Whitney Mercilus with one guy," O'Brien said.
Veteran cornerback Johnathan Joseph said it was difficult to see two key members of the defense go down on the same drive.
"You think about it because obviously you're human and you feel for the guy and it's obviously a loss and it makes you do different things on defense," he said. "But at the end of the day you've got to continue to play. It's got to be the next guy up mentality you've got to always have ... I'm not saying we're going to replace J.J.'s level of play but the next guy's got to step in and pick it up."
Watt was injured while being blocked midway through the first quarter and fell to the ground.
The defensive end remained on his hands and knees for a couple of minutes while trainers checked on him. They flipped him onto his back and were looking at his left leg. He was then helped to his feet and looked to be in a lot of pain and didn't appear to be able to put any weight on the leg as he was helped off the field by two Texans officials.
He remained on the sideline under a tent for a few minutes before being taken to the locker room on a cart.
About 30 minutes later, television footage showed Watt walking on crutches to an ambulance before sitting on a stretcher, being moved into the ambulance and taken away.
The 28-year-old Watt had 15 tackles this season, but didn't get a sack in five games. He had 1 ½ sacks last season, after leading the NFL with 17 ½ sacks in 2015 and finishing second in 2014 with 20 ½.
The Texans know that it's a big blow to lose a player of his caliber again, but they have to figure out a way to move on like they did last year when the defense allowed the fewest yards in the NFL despite his absence.
"He's a big piece, but ... you've still got to step up and play," nose tackle D.J. Reader said. "Somebody's got to go out there and play. Nobody feels sorry for you. The other 31 teams in the league don't feel sorry for you."
Copyright 2017 by KPRC Click2Houston. The Associated Press contributed to this report. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.