Nearly five years ago, the raging debate leading up to the 2015 NFL draft was which quarterback the Tampa Bay Buccaneers should take with the No. 1 overall pick.

They opted for Florida State's Jameis Winston over Oregon's Marcus Mariota, the latter heading to the Tennessee Titans with the very next pick. The two young passers would have their careers linked thereafter. 

Both players have experienced a roller-coaster of sorts over the last four-plus seasons. Mariota has led the Titans to the playoffs, while Winston and the Bucs have failed to do so. Winston is already the all-time passing leader in Bucs history and the first player in NFL history to start his career with back-to-back 4,000-yard seasons. 

But as they both play through the final season of their rookie contract, there's still just as much doubt about their futures as there ever was.

Winston has turned the ball over more than any other quarterback in the NFL since entering the league in 2015, and he was benched in favor of Ryan Fitzpatrick last season. Mariota was recently benched himself, and isn't expected to play when the Titans host the Bucs on Sunday.

Inconsistency has plagued both players throughout their careers. Winston threw a trio of interceptions in Week 1 of this season, but bounced back with four solid games in a row. In Week 6, however, he turned the ball over a staggering six times in a loss to the Carolina Panthers in London. Mariota has dealt with multiple injuries, and his inability to generate consistent production out of the offense led to being benched last week for Ryan Tannehill.

So, while Winston may not be directly facing Mariota on the field Sunday, his future may be just as much in doubt. New head coach Bruce Arians has maintained publicly that Winston's past turnover issues and performances won't hold any weight in terms of his decision to keep him as his quarterback of the future, but will he say the same thing if those turnover issues keep up?

These two were once the cream of the crop coming out of college. More than four years into their NFL careers, many are still wondering, their teams and fans included, if they were worthy of the original investment, let alone a future one.