Editor's note: Tony Grossi covers the Cleveland Browns for ESPN 850 WKNR.

The Browns kick off Phase 3 of their offseason program Tuesday with 48 new players – out of 90 – who were not on the team’s roster or reserve lists last year.

Welcome to the John Dorsey era.

The new GM has reshaped the roster with eight trades involving players, 10 veteran free agent signings and nine players selected in the draft.

The conservative estimate is eight new starters out of 22 on offense and defense, with an additional two moving to different positions. Another nine newcomers could take over key backup spots.

Dorsey’s transactions affected every position group, but two position groups were identified as weaknesses and were practically completely overhauled – quarterback and defensive secondary.

Over the course of the next four weeks, the Browns will have approximately 15 full-squad practices – 10 in OTAs and five in the mandatory minicamp to conclude the so-called offseason program.

We’ve selected one player in each position group who can use these practices to position himself better as an impact player to watch in 2018. This list is limited to players new to the team in 2018.

1. Quarterback Baker Mayfield

The No. 1 overall pick of the 2018 draft begins his Browns career No. 3 on the depth chart, according to coach Hue Jackson, which is not an unusual starting point. FOX analyst Troy Aikman predicted Mayfield will start in Game 1. That’s a longshot. For Mayfield to defy the odds and beat out projected starter Tyrod Taylor, he first has to surpass veteran Drew Stanton as the top backup. His progress in OTAs and the minicamp will tell us a lot.

2. Wide receiver Antonio Callaway

Veteran free agent Jarvis Landry is a given to significantly improve the catching ability of the receiver group. But Callaway, the fourth-round high-risk, high-reward gamble pick has a chance to unseat 2016 first-round bust Corey Coleman as the No. 3 receiver behind Josh Gordon and Landry. That would only happen if Callaway: 1. Stays free of NFL substance abuse program violations, and 2. Flashes the ability that led Dorsey to label him the “first or second” receiver in the draft. Callaway also should immediately revive the comatose punt return situation.

3. Running back Nick Chubb

The 35th overall pick is a downhill, between-the-tackles facsimile of free agent pickup Carlos Hyde. But Chubb’s surprising dexterity as a receiver at the NFL combine could cast him in a more varied role than he filled at Georgia.

4. Offensive lineman Austin Corbett

They’re not going to Cam-ify him, are they? Remember what the Browns did to Cam Erving? The 2015 first-round pick played left tackle and then center, in a pinch, at Florida State. At his first training camp, Erving would line up at any of the five O-line positions – sometimes from play to play. He turned into the proverbial jack of all trades, master of none. Corbett started four seasons at left tackle at University of Nevada, succeeding tackle-turned-guard Joel Bitonio. The hope is that the Browns will settle on Corbett’s rookie position by the start of training camp. But don’t bet on it.

5. Defensive lineman Chad Thomas

Not a prolific pass rusher at the University of Miami, the third-round pick was known to seal the left edge in the running game. Will he show enough pass rush in his game, though, to oust Carl Nassib as the backup left end?

6. Linebacker Genard Avery

This fifth-round pick was the only significant addition to the linebacker position group. He is another newcomer whose role is uncertain. He was a pass rusher at Memphis with limited coverage skills. Foremost, though, he is a fierce tackler and hitter, which makes him a potential core player on special teams.

7. Free safety Damarious Randall

First-round cornerback Denzel Ward certainly could be the choice here, too. But the veteran Randall is no less important. The former Green Bay cornerback is transitioning back to his natural free safety position. He is counted on to be a center field ball-hawk – something the Browns have not had since Tashaun Gipson emerged from undrafted free agent status to an interception-maker in 2013 and 2014.