When will the 1st-round QBs make their pro debuts?

For the first time since 1999, five quarterbacks were selected in the first round when Baker Mayfield, Sam Darnold, Josh Allen, Josh Rosen, and Lamar Jackson each heard their names called to start the 2018 festivities.

The futures of the Cleveland Browns, New York Jets, Buffalo Bills, Arizona Cardinals, and Baltimore Ravens are pinned on their new passers. But when will we see each of them make their pro debuts?

Who expects to take the field right away and who will have to sit and watch for what will be more than a season? Here are our projections.

Baker Mayfield, Browns

Tyrod Taylor may have been signed to be the Browns' next starting quarterback, but once Mayfield was announced as the first overall pick on Thursday night, the hourglass was officially flipped on Taylor's time at the helm.

Following seasons with 1-15 and 0-16 finishes, Taylor was brought aboard to put some wins on the team's ledger. His status as a bridge quarterback will be short-lived, however, as it won't be long before the franchise and its fan base push for Mayfield to start.

The defending Heisman Trophy winner isn't one to back away from a challenge, and he has a history of forcing a coaching staff to change its plans and install him as a starter. He walked on at Texas Tech in 2013 and was named the starter out of camp. Then he did the same in 2015 after walking on at Oklahoma.

Mayfield enters the NFL as the most pro-ready quarterback of the five selected on Day 1 of the draft. The Browns will likely balk at starting him in Week 1 after the failed DeShone Kizer experiment, but the barks emanating from the Dawg Pound will be too loud to ignore for long.

Prediction: Mayfield debuts Week 4 at Raiders

Sam Darnold, Jets

Darnold, the No. 3 overall pick, may have landed in the best position for long-term security, but the immediate future of the New York Jets will see 15-year veteran Josh McCown attempt to improve on his five-win output from a year ago.

McCown was re-signed to a one-year deal and will serve as a mentor to Darnold both on the field and off of it. Teddy Bridgewater is also in the fold, though he isn't yet fully recovered from shredding his knee in 2016.

Darnold isn't a finished product, so he'll have an opportunity to sit for a year and watch McCown attempt to recapture his 2017 magic. But the coast is clear and he'll be at the top of the depth chart to begin 2019.

Prediction: Darnold debuts Week 1, 2019

Josh Allen, Bills

The Bills traded up from pick No. 12 to the seventh selection and gave up two second-round draft picks to get Allen. But it still might be awhile before Buffalo fans see his cannon arm cut a football through the snow.

First, free-agent signee AJ McCarron will be given an opportunity to lead the charge after netting a two-year, $10-million deal.

Allen is considered to be the least pro-ready among the rookie passers. With McCarron as the unquestioned starter for 2018, Allen will be afforded as much time as he needs to work on his footwork and decision-making. And to get acclimated to the Buffalo snow.

Prediction: Allen debuts Week 5, 2019

Josh Rosen, Cardinals

When the Cardinals traded up to nab Rosen with the 10th overall pick, it was hailed as the best marriage of team and quarterback among those selected Thursday.

While Rosen could start right away, Arizona paid Sam Bradford $15 million guaranteed to take the helm in 2018.

Luckily for Rosen, Bradford hasn't played a full 16-game campaign since 2012. When he inevitably succumbs to injury, Rosen - leapfrogging backup Mike Glennon - will get his first taste of life with superstar running back David Johnson.

Prediction: Rosen debuts Week 10 at Chiefs

Lamar Jackson, Ravens

Much like the QBs taken in the first round last year, Jackson was selected by a team with an established starter. And as Mitchell Trubisky and Deshaun Watson did, Jackson will push Joe Flacco aside and quickly graduate from the future of the Ravens to the present.

The 2016 Heisman winner represents the most dynamic quarterback in Baltimore's history.

Jackson promised Thursday night that he will one day deliver a Super Bowl to Baltimore. The sooner he starts, the sooner he can deliver on his promise.

Prediction: Jackson debuts Week 11 vs. Bengals

(Photos courtesy: Getty Images)