One of the many responsibilities of head coaches in the NFL is to answer questions on injuries to their players. Houston Texans head coach Bill O'Brien is getting tired of addressing injuries. When asked whether Matt Kalil was injured, O'Brien seemed to be annoyed with the question.

“Is he hurt? I don’t have to release an injury report until the season starts,” O’Brien said. “Every time I come up here, I get asked about 50 questions about injuries. So, you’ll get an injury report when the season starts.

“Right now, I will tell you he is out of practice, per the head coach’s discretion. How is that for an answer? You good?”

On Tuesday, Kalil was noticeably absent from Texans' practice and questions began to emerge. The veteran left tackle missed the team's second preseason game against the Detroit Lions last week.

Last season, Kalil missed the entire year due to a knee injury and has had injury issues in recent seasons. In 2016, the left tackle missed 14 games with the Minnesota Vikings after a hip injury sidelined him.

Even when he has played, he's been inconsistent along the offensive line. Therefore, questions about his health are absolutely warranted. However, O'Brien doesn't seem to appreciate the questions pertaining to his offensive lineman.

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Not too long ago, O'Brien stated that Kalil was the Texans' starting left tackle and that the team is confident that he can produce at a high level again. The Texans will need better protection for Deshaun Watson in 2019 after allowing a league-high 62 sacks in 2018.