Dolphins QB Ryan Tannehill to undergo ACL surgery, miss season

He fills the roster spot vacated by Ryan Tannehill, who was formally placed on injured reserve after deciding to undergo surgery to fix his ACL injury.

Tannehill originally injured the knee last season during the team's Week 14 victory over the Arizona Cardinals.

The 29-year-old Tannehill could have elected to rest his left knee for six to eight weeks and attempt a comeback, but he elected for surgery instead. Tannehill opted against having the knee surgically repaired previous year. It was reinjured August 3, on a noncontact play, when Tannehill crumbled to the ground while scrambling in practice. Now it appears that knee injury will end Tannehill's 2017 National Football League season before it even begins. Tannehill will be placed on injured reserve, the person said.

The newspaper reported that Dolphins coach Adam Gase did not know the severity of McMillan's injury Thursday night.

Center Mike Pouncey, the three-time Pro Bowl selection who hasn't practiced since November due to a hip injury, participated in 11-on-11 drills Saturday.

Last season, Tannehill threw for 2,995 yards, 19 touchdowns and 12 interceptions while completing 67.1 percent of his passes and registering a passer rating of 93.5 over 13 games.

"It's all the way healed back up", Pouncey said of his hip. "That's more of our routine on game day, so we just kind of keep it consistent and work on it in practice". But the Dolphins have position flexibility as they search for a possible replacement. Both players have spent time in the middle, and could be asked to do so again.

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