Week 3 of the 2021-22 NBA season is nearing its end. Recent injuries have helped some players increase their fantasy value by earning more prominent roles, but others could fall by the wayside as big names look to return to the hardwood. 

Fantasy managers have a chance to capitalize on impending changes, and I've identified a few players worth moving ahead of Week 4. Here are nine of my favorite buy and sell candidates ahead of the weekend. 

Five to buy

Buy High

  • Jalen Brunson: Brunson stole the show by notching 31 points and 10 rebounds as a starter in the Mavericks' win over the Spurs on Wednesday, and that performance will likely earn him a more significant role moving forward. His scoring might not always be there, but Dallas needs his shot creation and playmaking on a team that lacks both. Kristaps Porzingis is already dealing with injury problems and is underwhelming when he does play. Brunson's versatile skill set could make him Dallas' clear-cut second-best fantasy asset.
  • Montrezl Harrell The Wizards are winning games, and Harrell has had a lot to do with that. The former Lakers big has re-established himself as a dynamic, scoring big. He's arguable the Wizards' second-best offensive threat, and he's evolved into a consistent double-double threat thanks to a career-high mark of 9.9 rebounds per game. It's hard to see Daniel Gafford or the recovering Thomas Bryant bumping Harrell from his current role.
  • Tyrese Haliburton: Haliburton isn't even a top-four scorer for the Kings and appears to be a serious threat to finish as a top-20 fantasy point guard. Sacramento's secondary playmaker has struggled to shoot the long ball and doesn't have the same scoring upside as some of his teammates, but his defensive contributions have helped him make up for what he lacks. He leads all point guards with 11 blocks and has 12 steals to his name. Sacramento's do-it-all guard's transition into a full-time starting role has done wonders for his fantasy ceiling. 
  • Tyler Herro Harrell is the only bench piece with Fantasy value comparable to Herro's. The Heat's star sixth man has poured in at least 22 real points five times in seven games and averages 18.1 shots per game. Only 18 players are making more field goals (8.6) per game, and few can match Herro's efficiency. Herro is shooting 47.2 percent from the field and 40.8 percent from deep. His willingness to get on the boards and act as a playmaker off the pine is the icing on the cake. 

Buy low

  • Devin Booker: Booker seemed like a sure-fire top-five fantasy shooting guard ahead of this season, but his struggles have gone hand-in-hand with his team's early on. While his rebounding is at an all-time high early on, his scoring and efficiency have taken a hit following the Suns' run to the NBA Finals last year. His free-throw attempts are down due to the NBA's updated officiating, but I expect him to get back to normal once he adjusts. Booker's averaged at least 25 points on 46 percent shooting for three consecutive seasons.

Four to sell

Sell high

  • Nickeil Alexander-Walker: Alexander-Walker might be worth holding onto in points leagues because of how shorthanded the Pelicans have been without Zion Williamson and Brandon Ingram, but his efficiency could make him difficult to work play in Roto leagues. He's shooting 35.5 percent from the field and 26.5 percent from three. He hasn't shot better than 50 percent from the field since New Orleans' season opener. You can get 13.2 points and 5.2 rebounds per game from many players, so consider sending him elsewhere before the heavy hitters return.
  • Gary Trent Jr.: Trent has enjoyed being the Raptors' fourth option on offense, but that could change soon. Like Precious Achiuwa, Trent should take a step back once Pascal Siakam gets back on the hardwood. Toronto's star swingman is set to return from the shoulder injury that's kept him sidelined in two weeks. Trent could be relegated to the bench when that happens. He'll still have value as a reserve, but his ceiling could lower dramatically. He averaged just 11.1 points and 1.9 rebounds per game through 18 games off the bench last season.

Sell low

  • Michael Porter Jr.: MPJ has been one of this season's most disappointing players. The Nuggets wing appeared to be in for a big year with Jamal Murray sidelined by an ACL tear and hasn't done anything with the opportunity. He's averaging just 10.9 points and 6.9 rebounds on 36.4 percent shooting after finishing as a top-five power forward in points leagues last year. His efficiency is terrible, and his production has dropped despite playing a career-high 32.2 minutes. If you can pawn him off for some serviceable pieces, do it.
  • Isaiah Stweart: Stewart moved into a starting role for the Pistons following Mason Plumlee's departure, but he's been outplayed by Kelly Olynyk. He finished outside the top 20 among centers in points leagues as a rookie, and his numbers are nearly identical in year two. Trey Lyles' growing role could threaten Stweart's ceiling, and it's doubtful that he'll explode in the second half of the season, given how much young talent Detroit is developing.