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The Waiver Wire Watch List: Week 21

Throughout the season, you want to get the jump on your competition and sniff out the breakout players before they break out. That's what this list is all about--using some in-depth research and advanced analytics to find the players who aren't quite there yet but are on their way. Some of these may suit your needs for an immediate pick-up depending on your team's situation.

This is not necessarily a list of players you should add right away at the start of Week 21 - it is a list of players to keep a very close eye on in most leagues as we further into June, and to consider picking up in deeper formats. In some cases, we will even caution you not to pick up a widely-added player, and steer you away from the fool's gold.

Use it to build your own watch list.

Be sure to check all of our fantasy baseball lineup tools and resources:

 

Pitchers to Watch in 12+ Team Leagues

Dillon Peters (SP, LAA)

After some early-season bullpen outings and an early-June spot-start, Dillon Peters was called up to join the rotation for good on July 21st. Since that call-up he's rattled off five decent outings, going 2-1 with a 3.14 ERA across 28.2 innings. His last three starts have been particularly impressive, as he's tossed quality starts in all three and has posted a 19:2 strikeout to walk ratio.

I'm particularly encouraged by the control he's showing, and while he's no flame-throwing ace, he strikes out just enough batters (21.2% in 2019) to be useful. Peters has a pair of tough draws in the Rangers and Astros this week so you're not adding him now, but I'm giving him a vote of confidence moving forward.

Joe Ross (SP, WAS)

Not unlike Peters, Joe Ross has been on a hell of a hot streak. He's dazzled in three August starts, going 3-0 with a microscopic 0.50 ERA across 18 innings of work. He's making a case for himself as the Nationals' fifth starter even when Max Scherzer returns (Ross is currently occupying his spot in the rotation), and with the Nationals chasing the Braves and staving off wild card contenders they will likely give him that opportunity. The nine walks are much higher than you'd like to see, but no home runs across the three starts is outstanding given he's had trouble with the long ball in the past.

You do still need to wait and see if he holds onto a rotation spot, but Ross has some truly encouraging numbers at the moment and he's worth watching closely.

 

Batters to Watch in 12+ Team Leagues

Mike Yastrzemski (SF, OF)

Yastrzemski is on an absolute tear right now, with six homers in his last seven games, bringing him to 16 on the season. This kind of power surge is unlikely to continue, but the 28-year-old is still seeing the ball extremely well right now. Yastrzemski isn't an immediate add given that his playing time still isn't a guaranteed thing every day (he does still head to the bench against lefties), but he also wouldn't be an everyday player in your fantasy lineup. As long as he's hitting this well, he could make for a nice injury replacement or bench player who gets in your lineup based on the matchup.

Luis Arraez (2B/3B/OF, MIN)

Arraez has been a pleasant surprise for the Twins this season, and he's been particularly productive in August. He's hitting .349 this month, and that has his average at an impressive .355 on the season as a whole. There isn't a ton of pop in his bat, as he has just three homers in 55 games, but his contact abilities and position in the potent Twins offense make him a useful asset in roto leagues. His 34 runs scored and obviously the batting average and .421 OBP earn him a platoon spot in your fantasy lineup if you're looking for a late-season boost.

Manuel Margot (SD, OF)

Remember when Manny Margot was an up-and-coming blue-chip prospect? He's never truly panned out, as he's never hit over .263 or hit more than 13 homers. He did set all those career highs and swipe 17 bags in his best overall season (2017), but that's not anywhere near living up to the initial hype. Margot still probably isn't much more than a middling MLB outfielder, but he's hitting extremely well in August in a part-time role. Across 27 plate appearances, he's hitting .375 with four homers and seven RBI, which might be enough to earn him some extra playing time. Watch and see if that becomes the case, and if it does Margot's speed and middling average/power combo would merit a roster spot for fantasy.

More Waiver Wire Pickups and Streamers




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REAL-TIME FANTASY NEWS

Scott Laughton

to Miss Sunday's Action
Ryan McDonagh

Exits With Injury Saturday
William Karlsson

Out Day-to-Day
Warren Foegele

Ready to Rejoin Kings Lineup Sunday
Jalen Chatfield

Out Indefinitely
Dougie Hamilton

to Miss at Least One Week
Harold Fannin Jr.

Likely Good to Go Against the Jets
Cedric Tillman

Anticipated to Play on Sunday
Tetairoa McMillan

Likely Playing on Sunday
D'Andre Swift

Anticipated to Play Against the Giants
Garrett Wilson

Expected to Suit Up in Week 10
Luke Kennard

Out On Saturday Night Against Lakers, Will Miss Second Straight Game
Maxi Kleber

Will Make Season Debut Saturday Night Against Hawks
Dean Wade

Questionable For Saturday Night Against Bulls
Larry Nance Jr.

Listed As Questionable For Saturday Night Against Bulls
Jared McCain

Available For Saturday Night Against Raptors
Ryker Evans

Comes Off Injured Reserve
Bilal Coulibaly

Officially Out For Saturday Night Against Mavericks
Joey Daccord

Kraken Place Joey Daccord on Injured Reserve
Jordan Kyrou

Rejoins Blues Lineup Saturday
Anthony Cirelli

Won't Play on Saturday
Casey Mittelstadt

Misses Meeting With Maple Leafs
Charlie McAvoy

Sits Out Saturday's Game
Sean Monahan

a Game-Time Decision Saturday
Tetairoa McMillan

Trending Towards Playing in Week 10
Jamal Murray

Listed As Questionable For Saturday Night Against Pacers
Aaron Gordon

Questionable For Saturday Night Against Pacers
Norman Powell

Listed As Probable For Saturday Night Against Blazers
Jaime Jaquez Jr.

Listed Questionable For Saturday Night Against Blazers
Bam Adebayo

Ruled Out For Second Straight Game
A.J. Brown

Off Final Injury Report, Set To Play Monday Versus Packers
Jalen Johnson

Questionable For Saturday Night Against Lakers
Saquon Barkley

Cleared From Final Injury Report, Good To Go For Monday
Nickeil Alexander-Walker

Listed As Questionable For Saturday Against Lakers
Ayo Dosunmu

Listed As Probable For Saturday Night Against Cleveland
Jakob Poeltl

Ruled Out For Saturday's Matchup Against Sixers
Justin Fields

Set to Start in Week 10 Against Browns
Aaron Jones Sr.

Expected to Play Sunday Against Ravens
Kristaps Porzingis

Ruled Out Versus the Lakers
Darius Garland

Resting on Saturday Night
Kyshawn George

in Danger of Missing Another Game on Saturday
Dereck Lively II

Not Expected to Face the Wizards
Daniel Gafford

on the Injury Report for Saturday Night
Anthony Davis

Questionable to Play Versus the Wizards
Brock Purdy

Could Return in Week 11
Jayden Daniels

Could Return After Three Weeks
Kyler Murray

Future with Cardinals in Limbo
Tyrone Tracy Jr.

Will Remain the Giants' Starting Running Back
Artemi Panarin

Ends Dry Spell With Three-Point Outing
Marcus Johansson

Extends Point Streak to Eight Games
Spencer Knight

Posts First Shutout of the Season
Matt Duchene

to Remain Out Saturday
Zayne Parekh

Expected to "Miss a Little Bit of Time"
Frank Nazar

Day-to-Day Following Friday's Early Exit
Rashid Shaheed

Could Play Extensively in Seahawks Debut
Aaron Judge

Headlines AL Silver Slugger Award Winners
Terry McLaurin

Officially Ruled Out for Week 10
Puka Nacua

Will Play in Week 10
William Eklund

Moved to Injured Reserve
Gustav Nyquist

Expected to Remain Out Friday
Brock Purdy

Questionable Again, Won't Start in Week 10
Garrett Wilson

Listed as Questionable for Week 10, Expected to Play
Shohei Ohtani

Headlines List of NL Silver Slugger Winners
MLB

Munetaka Murakami Officially Being Posted on Friday
Alvin Kamara

Listed as Questionable for Week 10
Aaron Jones Sr.

Questionable for Week 10
Randy Brown

Set For UFC Vegas 111 Main Event
Gabriel Bonfim

Looks To Extend His Win Streak
Joseph Morales

A Favorite At UFC Vegas 111
Matt Schnell

Set For UFC Vegas 111 Co-Main Event
Uros Medic

Aims To Win Back-To-Back Fights
Muslim Salikhov

Looks For His Fourth Consecutive Win
Chris Padilla

Looks To Remain Unbeaten In The UFC
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Looks To Get Back In The Win Column
Marco Tulio

Looks To Remain Undefeated In The UFC
Christian Leroy Duncan

Set To Open Up UFC Vegas 111 Main Card
Kyle Tucker

Headlines List of 13 Players to Receive Qualifying Offers
Pete Fairbanks

Becomes a Free Agent
CFB

Luke Fickell Will Return as Wisconsin's Head Coach in 2026
Bo Bichette

Blue Jays Extend Qualifying Offer to Bo Bichette
Craig Stammen

Named Padres New Manager
Jorge Polanco

Declines his 2026 Option to Become a Free Agent
Chris Sale

Braves Picking Up Chris Sale's 2026 Option
Michael Thorbjornsen

Poised to Continue Hot Play in Mexico
Davis Riley

Struggling to Find Form Ahead of World Wide Technology Championship
Taylor Montgomery

Leaning on Putter at World Wide Technology Championship
Stephan Jaeger

Offers Strong Value at World Wide Technology Championship
Ben Griffin

Looks to Stay Hot at El Cardonal
Nick Dunlap

Looking to Find His Game at El Cardonal
Wyndham Clark

Searching for Consistency at El Cardonal
Michael Brennan

Aims to Extend Fairytale Start at El Cardonal
Shane Bieber

Staying in Toronto for 2026
Salvador Perez

Agrees to Two-Year Extension With Royals
Trevor Story

Opts in for Remaining Two Years on his Contract
Yu Darvish

to Miss All of 2026 Following Flexor-Tendon Surgery
Shota Imanaga

Becomes a Free Agent
Luis Robert Jr.

White Sox Pick Up 2026 Option on Luis Robert Jr.
CFB

LJ Martin Expected to Play in Top-10 Matchup Against Texas Tech
PGA

LIV Golf Expanding To 72-Hole Format In 2026
Atlanta Braves

Braves Hire Walt Weiss as Their Next Manager
Kris Bubic

Cleared to Begin a Throwing Program
Brandon Woodruff

Declines Mutual Option for 2026
Freddy Peralta

Brewers Exercise 2026 Option on Freddy Peralta
Lucas Giolito

Declines his 2026 Player Option
J.J. Spaun

Finishes Sixth at Procore Championship
PGA

Matti Schmid Finishes Tied for 46th at Baycurrent Classic
Keith Mitchell

Finishes Tied for 10th at Baycurrent Classic
Si Woo Kim

Finishes Tied for 21st at Genesis Championship
Mackenzie Hughes

Misses The Cut at Sanderson Farms Championship
Max Greyserman

Finishes Second at Baycurrent Classic
Austin Eckroat

Finishes Tied for 56th at Baycurrent Classic
Luke Clanton

Finishes Tied for 56th at Bank of Utah Championship
Pete Alonso

Officially Opts Out of his Contract With Mets
Kyle Larson

Wins His Second NASCAR Cup Series Championship at Phoenix
Ryan Blaney

Concludes the 2025 Season with A Win at Phoenix
William Byron

Strong Championship Effort Ends With Late-Race Flat-Tire Crash
Denny Hamlin

Overtime Four-Tire Call Costs Denny Hamlin the Championship
Chase Briscoe

Championship Bid Never Really Started After Two Tire Failures
Brad Keselowski

Nearly Steals Phoenix Race
David Onama

Suffers First-Round TKO Loss
Steve Garcia

Scores First-Round TKO Win
Ante Delija

Suffers His First UFC Loss
CFB

Dylan Raiola Suffers Season-Ending Injury
Waldo Cortes-Acosta

Gets Knockout Win
Themba Gorimbo

Drops Decision At UFC Vegas 110
Jeremiah Wells

Gets Back In The Win Column
Yadier del Valle

Remains Undefeated

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