CLEVELAND, Ohio - For all of those who think that Sam Darnold to the Browns at No. 1 is a done deal, not so fast. Jordan Palmer, who trains both Darnold and Josh Allen, believes the Browns will also be blown away by Allen during his Pro Day Friday at Wyoming.

"I've never seen anybody like him,'' Palmer, a former NFL quarterback, told cleveland.com at the NFL Combine earlier this month.

Palmer, who will run Allen's Pro Day like he did Darnold's on Wednesday, is on record as saying that 'both will be studs' and 'franchise dudes' the Browns can't go wrong with either one.

But he's confident eyes will be popping during Allen's Pro Day and that more 'oohs' will escape from grizzled evaluators like they did during the combine when he hurled a 65-yard pass. He also thinks that Allen will make it very hard for the Browns to pass on him at No. 1.

"I think he'll have three or four misses on his Pro Day out of 70-75 throws, which will be the gold standard,'' said Palmer. "I think he'll have one of those Pro Days everybody talks about for the next decade.''

Palmer, a former NFL quarterback and the younger brother of Carson Palmer, the former No. 1 overall pick of the Bengals and a three-time Pro Bowler said Allen has "got the craziest arm I've ever seen and there's a chance he runs 4.6 (in the 40 -- he ran 4.75 the combine). He's 6-5, 6-6-ish.''

He added, "those are quantifiable things. Those aren't the 'spirit of this kid is unique. There's some of that stuff that's amazing too but just the things that you can literally sit there watch and quantify, it's crazy.''

Palmer, who played for the Redskins, Bengals, Jaguars, Bears, and Titans, compared Allen's potential to that of Houston's Deshaun Watson, whom he also trained before the 2017 draft. Watson lit it up for the Texans last season, with 19 touchdowns and eight interceptions before tearing his ACL.

"Is (Allen) as good as he's going to get? Or is he capable of way more?'' said Palmer. "The perfect example is last year with Deshaun Watson. People could talk about, they didn't know how smart he was because he played in such a simple system. Well I spent six years, but really the last three months being with him and I realized that he's going to be a way better pro than he was in college because they ran a simple system not because of him.

"They ran a simple system because that's what they run and it's working But I knew that once he got in with a guy like Bill O'Brien, he's actually capable of doing everything that the elite veteran 13, 14, 15 year veterans do. He's going to be capable of that in the first two or three years and I think the same thing about Josh.''

Palmer, who's remained close with Browns quarterbacks coach Ken Zampese from their days together in Cincinnati, also believes Allen compares to 2016 No. 2 overall pick Carson Wentz. If that's the case, the Browns have a chance to correct their egregious error of trading that No. 2 pick to the Eagles that season. Wentz, of course, went 11-2 last season with 33 touchdowns and seven interceptions before tearing his ACL and LCL and missing out on the Super Bowl victory that he was partially responsible for.

"In terms of competitive temperament I think it's really similar,'' said Palmer. "Size, athleticism, arm talent, I don't know that Carson throws it as well as Josh does in terms of velocity and arm strength, and I think that Carson Wentz is the MVP of the league, it's not an indictment. But the way that they approach the game I think is similar. They're obsessed with it, which you've got to be at this young age especially. And so yeah, I think there are some comparisons there.''

Of course, the big question with Allen is his accuracy and his 56.2 completion percentage, which scares the heck out of offensive coaches. But guess what?

"We've fixed it,'' said Palmer.

He said with Allen's poor completion percentage "there are two ways to look at it: one, what he's doing mechanically, and then two what's happening around him, receivers and the concepts and the coverages that they're seeing and there's a lot of complexities that go into both of those.

"From a mechanics standpoint you have to be athletic enough take an old muscle memory and create a new muscle memory. Take something that was an old habit and replace it with the new habit. With Josh, it was tied to his base and kind of where his feet are placed and how short his front stride is. And so making a small adjustment has made a huge impact.''

He said "the growth in accuracy that you're going to see throughout the draft training process and throughout his transition into the NFL and to being a franchise starter, is going to be tied to that.''

As for the talent Allen had around him at Wyoming, Palmer said he was a man amongst boys.

"His tape is hard to evaluate, even for me, when I was getting to know him,'' he said. "It's hard to evaluate similar to Pat Mahomes because I feel like on tape -- and I can say, this Josh can't -- he looked like an eighth-grader playing with the sixth-grade team. If you're an eighth-grade basketball player playing with sixth graders, and you're a right-handed dribbler, you're probably never going to be in a situation where you have to dribble with your left hand. You probably don't ever really have to work on certain things because you're just bigger, stronger, faster than all of the other kids.

"And so, with what they had around him on offense, the level that that league was, there were just a lot of things that he's capable doing in the NFL that he wasn't able to do at that level.''

Palmer acknowledged that he "also missed throws, he also missed reads along with everybody else in this draft class. But because there's so much attention on him, and when you have a player who's ranked and rated as high as he is playing at a lower level, the expectations a lot of times, they're not possible because it takes more than just throwing the ball there. Everything else has to come into place too. With that being said, he made enough plays on tape in every game to show you what his ceiling is.''

He said he didn't tinker much with Allen's cannon arm, which continues to amaze him. Instead, he corrected his overstriding and everything fell into place from there. The improvement was evident at the combine, where Allen dazzled coaches and scouts with his arm talent.

"When the ball comes out of a guy's hand crappy on a good player, it's the sequencing,'' said Palmer. "You actually have to fix the sequencing and build muscle memory around that. If he has a bad throw, he'll follow it with a really good one because he has the fix.''

Palmer said the Browns will be very impressed with both Darnold and Allen when they put them on the whiteboard to test their football IQ. They're also conducting private workouts with them, and have done so this week with Josh Rosen and Baker Mayfield, who's individual workout was Thursday.

"A lot of confidence, very, very cerebral,'' said Palmer of Darnold and Allen. "They didn't run pro style systems and all of that stuff, and so they're not coming from years of doing it, but I have introduced them to a lot of it an we've installed an entire offense as a digit system and as a concept system and they learn really, really quickly.

"They're guys that are going to be able to communicate exactly what they're thinking. They're excellent communicators and they're very, very humble so they come from a place of humility. They're not the guys to come in here and say 'I'm going to be the greatest quarterback that ever lived.' I think they both believe those things about themselves but they're so humble which is great but they're very, very confident so I think they're going to have great interactions with them in their meetings.''

Palmer said Allen, who's living with Darnold while they train with Palmer out in southern California, has come out of his shell over the past two months and 'is one of the funniest people I've met.'

He said he's 'absolutely' the face of a franchise.

Question is, will it be the Browns?