Marcus Mariota is the only first round pick that remains unsigned.

Mariota was the second overall pick by the Tennessee Titans.

The Titans don't expect Mariota to miss training camp.

David Fluellen is finalizing a one-year contract with the Tennessee Titans, a source tells RealGM.

Fluellen is a running back out of Toledo, who went undrafted in 2014.

Fluellen initially signed with the Indianapolis Colts and then was traded to the Philadelphia Eagles last summer. Fluellen has since had workouts with the New England Patriots and San Francisco 49ers.

The Titans also released Shonn Greene on Tuesday.

The Tennessee Titans have released Shonn Greene.

Greene reported to the team after previously skipping voluntary offseason workouts. He was scheduled to make $3.25 million on a three-year, $10 million deal signed in 2013.

Greene complied 687 yards on 171 carries and just six touchdowns in 24 games over two years.

Marcus Mariota credits playing soccer when he was young for developing his athleticism, fundamentals and intelligence.

"I think soccer is a great fundamental sport -- I think it built a foundation for me as an athlete," Mariota told WGFX-FM in Nashville, via ESPN.com. "Whether that's my footwork now, or relative to just kind of seeing the field and instincts.

"I think soccer is just such a game where you have to understand the complexities and the system of what's going on, and you have to know that before you get the ball. And once you get the ball, you have to react. I think that has helped my growth not only as a football player but as an athlete."