NASHVILLE -- The Titans returned to the practice field on Friday at Saint Thomas Sports Park to continue preparations for Sunday's game against the Houston Texans.

Here's a look at three quick hits from Friday:

Corey Davis Cleared

Titans receiver Corey Davis has cleared concussion protocol and is good to go for Sunday's game.

Davis left last Sunday's game against the Saints with a concussion, but he was back on the practice field during the week and practiced again on Friday. Davis had three catches for 40 yards against the Saints before being sidelined.

"The concussion protocol is for our safety, so it's a long process," Davis said. "I am just glad to be back. Coach (Mike) Vrabel was there with me, making sure I was good.

"I am (good), and I am ready to ball."

The Titans are in a win-and-in playoff scenario this Sunday. Davis, who has 39 catches for 557 yards on the season, is ready to do his part.

"To be playing meaningful ball in December, that's what it is about," Davis said. "We know what it is all about, it's win-or-go-home at this point so you put everything on the line. We have to go down into a hostile environment and handle our business. We have to go down there and play our best ball."

Jackson Frustrated

Titans cornerback Adoree' Jackson has been ruled out for Sundays' game, and it will be his fourth straight missed game since suffering a foot injury in the team's game at Indianapolis.

Jackson said he's tried to stay upbeat while helping his teammates out in recent weeks.

"Just doing whatever I can to help out, whether it's in meetings rooms or helping out with notes to give our guys any edge possible," Jackson said. "I've tried to do whatever I can do to help."

But Jackson admits it's been frustrating. He's still holding out hope of playing this season if the Titans advance to the playoffs.

A first-round pick in 2017, Jackson played in 45 of 46 games for the Titans before being sideline earlier this month.

"I am always positive – I never think negative or on the downside," Jackson said. "I always try to look on the plus side, and you never know what may happen so we are doing all we can to get this thing right and get me together so I can be ready to go.

"It's frustrating. My mom came (to town), and they see how down I was. Talking to my girlfriend, my mom, my dad, they try and keep me up in spirits because it is tough. This is a game I have been playing my whole life and it's the first time I have not been playing. So I am just trying to deal with it the best way I can and stay positive and try to get healthy. Even though I am not playing I am just trying to help out as much as I can."

Injury Report

In addition to Jackson, receiver Adam Humphries (ankle) and receiver Kalif Raymond (concussion) have also been ruled out for Sunday's game.

Linebacker Harold Landry (not injury related) was back on the practice field on Friday after not practicing on Thursday and he's good to go.

Running back Derrick Henry (hamstring), linebacker Daren Bates (shoulder) and defensive lineman Jeffery Simmons (knee) all practiced again on Friday and are good to go as well. Henry was a full participant in practices all week after being held out of Sunday's game vs. the Saints.

Receiver Cody Hollister (ankle), whose work has been limited all week, did not practice on Friday. He's listed as questionable for Sunday's game.