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 Yes ||||| HOUSTON -- Texans defensive end J.J. Watt is out for the season after he suffered a tibial plateau fracture in the team's 42-34 loss to the Kansas City Chiefs, coach Bill O'Brien said Monday. 
 
 Watt fell to the ground while engaged in a block on the Chiefs' opening drive. The veteran defensive end was helped to the sideline by the Texans training staff and was looked at in the sideline tent before being taken off on a cart. He was eventually taken to a hospital in an ambulance. 
 
 O'Brien also confirmed that outside linebacker Whitney Mercilus will be out for the remainder of the season with a torn pectoral muscle. 
 
 "The deal in this league is that the train doesn't stop moving," O'Brien said. "These guys are there, and they're going to have to step in. 
 
 "It's going to be multiple guys. You don't replace J.J. Watt or Whitney Mercilus with one guy. That's ridiculous. So it's going to a lot of different guys that are going to chip in to help." 
 
 On Monday morning, Watt tweeted to apologize to his teammates and the city of Houston. 
 
 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 
 
 Watt, 28, missed the last 13 games of the 2016 regular season because of a back injury. He played in his first regular-season game since his September 2016 back surgery in this season's opener against the Jacksonville Jaguars. In four games, Watt had 13 tackles, but he did not have a sack. ||||| Bob Levey/Getty Images 
 
 Houston Texans superstar defensive lineman J.J. Watt suffered a serious left leg injury Sunday against the Kansas City Chiefs in the first quarter and was unable to walk off the field under his own power. 
 
 The Texans announced Watt has a tibial plateau fracture, and head coach Bill O'Brien confirmed Monday that Watt will miss the season after Ian Rapoport of NFL Network reported the news Sunday night. 
 
 Watt was seen on crutches entering an ambulance after suffering the injury, per Aaron Wilson of the Houston Chronicle. 
 
 Watt and his brother T.J. tweeted about the injury: 
 
 Adding to the Texans' woes in Week 5, John McClain of the Houston Chronicle reported Whitney Mercilus needs surgery to repair a torn pectoral muscle suffered in the first quarter and will miss the rest of the season. 
 
 Injuries are becoming a worrying storyline for Watt. A back injury cost him all but three games in the 2016 season, and he dislocated a finger in the season opener, though he didn't miss a game. He also dealt with a broken hand in 2015. 
 
 When he's stayed healthy, he's been the most dominant defensive player in the NFL. In his first five seasons (2011-15), he registered 372 tackles, 74.5 sacks, 15 forced fumbles, 12 fumble recoveries and 45 pass deflections. 
 
 Pro Football Focus ranked him as its top player for the 2014 season and No. 5 player in 2015. He's a three-time Associated Press Defensive Player of the Year, four-time Pro Bowler and four-time first-team All-Pro selection. 
 
 Watt is the heartbeat of the Texans defense and recently used his platform to raise over $37 million in donations for relief for those affected by Hurricane Harvey as more than 200,000 people donated. 
 
 While the team managed to reach the postseason without Watt in 2016, the defense is far better when he's in the lineup alongside Jadeveon Clowney. 
 
 In his absence, Brandon Dunn, Joel Heath and Carlos Watkins should see more time in Houston's defensive line rotation. ||||| 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.
– Houston Texans fans who have been holding their breath since their superstar defensive end JJ Watt went down with an injury in the first quarter of the team's 42-34 loss to the Kansas City Chiefs Sunday had their collective hearts broken on Monday, per Bleacher Report. After the Texans tweeted Sunday evening that Watt, a three-time NFL Defensive Player of the Year, had suffered a tibial plateau fracture in his left leg, head coach Bill O'Brien confirmed that the injury had ended Watt's season. Early Monday morning Watt tweeted, "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." Watt's injury occurred at the seven-minute mark of the first quarter. While attempting to work his way around the Chiefs' offensive line he appeared to have his leg run into by his own teammate, causing him to fall to the ground. Watt was escorted to the sideline by Texans staff and eventually put into an ambulance and taken to a hospital, ESPN reports. Making matters worse for the Texans, Watts' teammate Whitney Mercilus was also forced to leave Sunday's game with a season-ending injury. Watt, 28, sat out most of last season with a back injury.