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. 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.
– 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.