MIAMI GARDENS, Fla. -- Sam Shields isn't sure what happened, either.
With 3:44 left in the third quarter of Sunday's 27-24 win over Miami, the Green Bay Packers' fifth-year cornerback was standing on the field before the start of a defensive series when he felt a slight pinch in his knee. He crumpled to the ground before the play started.
Shields was jogging out to his left cornerback spot to cover Miami receiver Mike Wallace at the time of the injury. When he realized he wasn't able to play through it, Shields fell to the ground and was replaced by Davon House.
Shields walked gingerly out of the locker room with a pronounced limp after the game. He said early indications are nothing was torn -- if it were, it likely would end his season -- but he'll have to wait until Monday for a full diagnosis.
"It was out of nowhere," said Shields, who intercepted Miami quarterback Ryan Tannehill earlier in the game. "They said nothing torn or nothing like that, so that's a good thing.
"I guess I'll go in tomorrow and see what's up." Shields paused for a moment before adding with a slight laugh: "But it hurts."
Shields' injury started a snake-bitten drive for the Packers' secondary. Two plays later, cornerback Tramon Williams joined him on the sideline after having an ankle rolled up on. Both starters left the game and didn't return.
Casey Hayward replaced Williams on the outside with veteran Jarrett Bush subbing in during the nickel subpackage. The defense gave up three consecutive touchdowns after Shields and Williams left as the Dolphins grabbed a 24-20 lead, but made a stop on the final series to give the ball back to its offense.
"Casey and I feel like we can start in this league," House said. "We looked at each other like, 'Man, this is what we've been waiting for,' to show the world that we're not just backups. We felt like we did a good job out there, but that was the last thing on our mind was two corners on back-to-back plays coming out."
The Packers also lost inside linebacker Jamari Lattimore in the first half to a neck injury. He was replaced by Brad Jones.
-- firstname.lastname@example.org and follow him on Twitter @WesHod.