Mariota, headed into his fifth NFL season, has started 55 games since being drafted by the team in 2015.

He's completed 1,015-of-1,605 passes for 12,004 yards and 69 touchdowns, with 42 interceptions. His career completion percentage is 63.2 percent, and his career passer rating is 89.4

Mariota started 13 of the team's 16 games in 2018, and played in 14 of 16. He finished the year with 2,528 passing yards with 11 touchdowns and eight interceptions. He set the franchise record with a completion percentage of 68.9 %.

Robinson said Mariota is healing up from his injuries from 2018.

"He said he's feeling good. He's working out, moving around, throwing," Robinson said of Mariota. "So I think he is going to come back here a little bit before the appointed time (for the offseason program in April) and get some work in. … We are excited to have him back on our football team and looking forward to it."

Tannehill, a first-round pick (eight overall) by the Dolphins in the 2012 NFL Draft, has played in 88 career games in seven seasons in Miami, and he completed 1,829-of-2,911 passes for 20,434 yards, with 123 touchdowns and 75 interceptions. His career completion percentage is 62.8 percent, and his career passer rating is 87.0.

A 6-foot-4, 207-pounder, Tannehill also has 1,210 rushing yards and six touchdowns in his career.

Tannehill, 30, started 11 games for the Dolphins in 2018, and he completed 176-of-274 passes for 1,979 yards and 17 touchdowns, with nine interceptions. He missed the 2017 season with a knee injury.

"He has certainly played a lot of football in this league, and he is a tough guy, and he's a smart guy," Robinson said of Tannehill. "He is a pretty accurate passer. Like all quarterbacks you have some ups and downs, but I thought he did his best to put the team in position in Miami to win.