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NASHVILLE, Tenn. –** The Titans just wrapped up practice on Wednesday at Saint Thomas Sports Park.

On Sunday, the team will face the Dolphins in Miami.

Three quick hits:

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Weeden's first day**

Veteran quarterback Brandon Weeden, who signed with the Titans on Tuesday, practiced for the first time on Wednesday.

Weeden, decked out in No.3 in practice, looked good, Titans coach Mike Mularkey said. Weeden gives the team insurance at the position heading into Sunday's game against the Dolphins.

"I am excited about it," Weeden said. "Yesterday was a long day (studying) – I put a lot of hours in. And it's going to be a long night. But I have to put the work in. … I just have to take it day by day and get ready to play on Sunday, and if my number is called, go play. I just have to continue to prepare like a pro. I am excited to be here and (want to) take advantage of the opportunity." 

Starting quarterback Marcus Mariota suffered a hamstring in Sunday's game against the Texans, and he's "day to day." Back-up quarterback Matt Cassel relieved Mariota on Sunday, and he would start of Mariota is unable to play.

Weeden, who's 33, has played with the Browns, Cowboys and Texans in his career. He's friends with running back DeMarco Murray and center Ben Jones from previous stops.

Because of his experience in Dallas, which uses an offensive system similar to the one in Tennessee, Weeden's transition should be smoother at the start, and it's one of the big reasons the team signed him instead of some of the other quarterbacks available in free agency.

"He threw the ball well," Mularkey said of Weeden. "He threw the ball very well. He did a lot of the "look" team, he took about three snaps of the period of our offensive snaps just to get him comfortable in the huddle calling the plays, using the motions, our cadence and everything, just to try and get him up to speed as quickly as possible. I was impressed."

In his career, Weeden has completed 559-of-965 passes for 6,462 yards, with 31 touchdowns and 30 interceptions.

Weeden last played in an NFL game in 2015, when he started three games with the Cowboys and one game with the Texans.

"It's kind of been a long four weeks, I've been kind of working out on my own, throwing on my own (in Oklahoma City)," Weeden said. "The unfortunate thing is a lot of teams have kept (just) two quarterbacks this year, that has kind of been the trend. Unfortunately, for a guy to get a job like myself somebody has to go down … so you are really just playing the waiting game.

"So being a fan of the NFL, I have a little man cave upstairs and I would try and watch as many games as I could, and followed the guys I played with the last few years. … I was excited to come here. … It's a great quarterback room."

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Titans pass rush**

The Titans have seven sacks through four games.

Linebacker Derrick Morgan leads the way with three sacks.

After practice, Mularkey was asked about the team's pass rush.

"I'm alright with it," Mularkey said. "We're putting a lot of pressure on them. We've played some quarterbacks that have been on the run, have made some plays on us. We knew going into the game plan that that was a possibility, we have put a lot of pressure on quarterbacks. Do we have the sack numbers we had maybe this time last year? No, but I do like the way we're coming after them."

Injuries

Titans receiver Corey Davis (hamstring) and safety Johnathan Cyprien (hamstring) did not practice on Wednesday. Mularkey said earlier in the week the two players aren't expected to play on Sunday. 

Guard Quinton Spain (turf toe) did not practice. 

"We're hoping he can go tomorrow, at least on a limited basis," Mularkey said.

In addition to quarterback Marcus Mariota (hamstring), cornerback Tye Smith was limited (neck) in Wednesday's work.