The Tennessee Titans have agreed to a four-year contract with free agent running back Dion Lewis.

A person familiar with the deal says the sides agreed to the contract on Tuesday. The person spoke on the condition of anonymity because signings can't become official until the start of the new league year on Wednesday. ESPN's Adam Schefter first reported the pact.

The person said the deal for the former Patriots starter carries a maximum value of $23.4 million.

Lewis had his first season with New England in 2015 season cut short by knee surgery after seven games.

He played just seven games during his return in 2016  Jordy Nelson Jersey , but he had a career season in 2017, leading New England with 896 rushing yards and six rushing touchdowns. He also had three receiving scores and was the Patriots' best kickoff returner, posting a 103-yard return for a touchdown against Denver.

In Tennessee, he joins Derrick Henry in the backfield. He'll also be reunited with former teammate Logan Ryan as well as Malcolm Butler, who also agreed to a deal with the Titans on Tuesday.

ALLEN PARK, Mich. (AP) Matthew Stafford dropped back and connected over the middle with Golden Tate.

Before the Detroit Lions lined up to take another snap in the two-minute drill, Stafford's short pass to Tate was shown on a pair of huge TV monitors.

The Detroit Lions under first-year coach Matt Patricia are part of a trend: NFL teams using instant replay to make quick corrections and observations during training camp.

The Oakland Raiders  Justin Bethel Jersey , Los Angeles Rams, Cleveland Browns and Miami Dolphins are also taking advantage of technology common in stadiums on game days.

Tate said the replays between snaps are shown too quickly for him to see them. But if the receiver is walking off the field while the second-string offense is coming on it, he takes a peek at the previous play.

"I look at what the coverage was," Tate said. "I can also pull a coach aside and say, `What could I have done differently?'

"It's great to be able to go over something quickly when it is fresh in your mind versus having to wait and forget about it."

The Lions, like a lot of teams in the league, have cameras perched atop towers higher than goal posts. Camera operators use joysticks to zoom in and out  Stephone Anthony Jersey , tilt up and down and pan the field to record the action. The Lions also have an operator with a safety harness on a scissor lift. And closer to the ground, staff members hold cameras and put them on short tripods to get other vantage points.

Cornerback Darius Slay said he always looks at replays in practice, especially if a teammate catches a pass against him.

"I want to know what I did wrong," Slay said. "I can correct it just as fast as I can see it. I'm glad (Patricia) got that out there for us.

"You can see what's wrong – fast."

Instant replays during practices potentially provide another way to help players on the sideline, who aren't getting hands-on repetitions.

"It's a great teaching tool for our team," Oakland coach Jon Gruden said. "I think it'll be better when we have one huddle going at a time. We had two huddles going at once, so it was a little bit chaotic."

The Rams also put up a big replay board on the side of a field at their camp at UC Irvine  Kenneth Dixon Jersey , giving them a chance to get and give immediate feedback instead of waiting hours for a film session.

"That's really the intent of it," Rams coach Sean McVay said.

The Browns have a new camera system and it includes a replay screen at their training facility.

"People who are getting the mental reps, who are not doing it, can turn back and really see what is really going on," Browns coach Hue Jackson said. "Understand the defense, where the offense might have broken down, or why we executed pretty well. I think it is a really good thing to have for both offense and defense."

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AP Pro Football Writer Josh Dubow and Sports Writers Tom Withers  Tommylee Lewis Jersey , Greg Beacham, and Steven Wine contributed.

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