Defensive end Young is considered the finest player of the 2020 class by many, having accrued 30.5 sacks in three years at Ohio State.
Only New England Patriots great Mike Vrabel, with 36, has more in Buckeyes history and last year Young broke a school record with 16.5 sacks in a single season.
Bosa, who helped the San Francisco 49ers reach the Super Bowl at the end of a brilliant debut campaign, played college football with Young in 2017 and 2018 and expects him to thrive at the next level.
"I think he'll be Defensive Rookie of the Year next year, or even more," said Bosa.
"I think his potential is as good as anybody's, just with his physical attributes - he's 6'5", 270 [pounds], runs like a receiver, strong.
"We're going to have to get together and work, get him right, it's a little different playing NFL tackles, but once he gets the hang of it, he's going to be the real deal."
Bosa was drafted with the second overall pick last year, one spot ahead of where older brother Joey was selected by the Chargers in 2016.
The two are already Pro Bowlers and Young looks set to be the latest elite defensive lineman to come out of Ohio State, with the younger Bosa crediting coach Larry Johnson for the school's proud draft record.
"He knows how to develop players," Bosa explained.
"If you give him a five-star [prospect], he's probably going to be a top-five pick."
Though Bosa's campaign ended in disappointment when the Niners were beaten by the Kansas City Chiefs in Super Bowl LIV, he produced one of the best rookie seasons in recent times.
The 22-year-old had nine sacks in the regular season and a further four in three playoff games, and he believes he has only scratched the surface of his potential.
"I think there's a lot more [to come], I think I improved a lot more this year even," Bosa added.
"If I can make the same improvements I've made from my junior season at Ohio State to now, if I could repeat that next year then there's going to be some pretty big improvements."
Young tore his ACL and MCL in Week 14 of last season and returned to practice on November 2, giving the Commanders 21 days to activate him. He was not brought onto the active roster for either of the team’s previous two games, but he is likely to make his season debut in some capacity Sunday.
"We won’t play him unless we feel he’s ready to roll," Washington coach Ron Rivera said Saturday. "There are some things he’s not comfortable doing… you can see his frustration because he wants it to happen now."
There was hope that Young would be ready to play Monday at Philadelphia, but he still wasn’t doing everything at full speed. The Commanders ended the Eagles' unbeaten season with a surprising 32-21 victory even without him.
That gave Washington four wins in five games and left them at 5-5, squarely in the wild card race in the NFC.
Young was the second overall pick in the 2020 draft and was named NFL Defensive Rookie of the Year after he had 7.5 sacks, 44 tackles, four forced fumbles and three fumble recoveries, one of which he returned for a touchdown.
He wasn’t nearly as effective last season, with 1.5 sacks and 26 tackles in nine games before the season-ending injury.
Now the earliest Young can suit up for the Commanders is Week 5 after officially placing the star pass-rusher on the reserve/physically unable to perform (PUP) list on Tuesday.
Young is still recovering from a torn ACL in his right knee sustained in Week 10 of last season and Rivera had already ruled him out for the 2022 opener against the visiting Jacksonville Jaguars on September 11, while also hinting he could wind up on the PUP list.
Under the new rules for the PUP list, a player must sit out at least four games, meaning the first game Young will be eligible to play is against the Tennessee Titans on October 9.
After capturing Defensive Rookie of the Year honours and earning a Pro Bowl selection in 2020 with 7.5 sacks, four forced fumbles and three fumble recoveries to help Washington win the NFC East, Young's production dipped last year before his season-ending injury.
In nine games in 2021, Young finished with just 1.5 sacks and two forced fumbles without recovering a fumble as Washington ended the season in third place in the division.
Placing Young on the PUP list was a necessary move as all teams must trim their rosters to 80 players by Tuesday's deadline.
Defensive end Young was carted off in the second quarter of Sunday's 29-19 win over the Tamp Bay Buccaneers after appearing to suffer a knee injury.
It was soon reported that the 2020 second overall pick had suffered a torn ACL and Washington on Monday confirmed he will not return this season.
Young, the Defensive Rookie of the Year in 2020, will undergo surgery in a blow to Washington, who were already without Montez Sweat.
"They're big, athletic and can move. Those guys are hard to find," Rivera said of Young and Sweat.
"[Young] had some good moments early in the game. It was promising.
"You do lose the threat of that type of player coming off the edge now. We have a couple workman guys who get an opportunity. We'll see how they handle it."
Young had 1.5 sacks and two forced fumbles through nine games this season.
