The Texans offensive line is arguably one of, if not the biggest storyline heading into training camp next month. At least four new starters will make up the o-line, in addition to third-year center Nick Martin.

Martin started 14 games last season before an ankle injury landed him on injured reserve on Dec. 19. The Texans fortified the position group by signing center/guard Zach Fulton, guard Senio Kelemete and tackle Seantrel Henderson in free agency this offseason.

"Seantrel Henderson - I don't know if you've met him yet – he's a mountain of a man," O'Brien said. "He's got really good feet, smart guy. Fulton can play guard, center. He could probably, in a pinch, go out and play tackle if he had to. And Kelemete can play either guard spot. He could probably play center if we had to, so they're very versatile guys and I think we're better there. I really do."

The Texans also have a number of returning players vying for a starting spot in camp, including second-year tackle Julién Davenport. Last year, Davenport started four games, including three at left tackle.

"He's (Davenport) really made a lot of progress,' O'Brien said. "He played at the end of the year and he held his own against some pretty good defensive ends. That was a good beginning for him, and I think he's built on that. He really did a good job in the time that he was away from here working out because when he came back here, you could tell he was in shape and ready to go. I think he's had a good spring. He just needs to try to keep getting better every day."

Texans players will report for training camp on Wednesday, July 25. Houston Texans Training Camp presented by XFINITY will begin on Thursday, July 26 at The Greenbrier in West Virginia for the second year in a row and will continue in Houston following the Texans' first preseason game at the Kansas City Chiefs on Thursday, Aug. 9.