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Fantasy Baseball Advice: Undervalued Starting Pitchers (Week 21)

Reid Contini's fantasy baseball advice and waiver wire pickups for MLB starting pitchers in week 21. RotoBaller.com helps you win your fantasy leagues!

In this piece, RotoBaller will highlight a selection of starting pitchers owned in less than 75% of both CBS and Yahoo leagues that have favorable matchups in the upcoming week. Whether you’re suffering from injuries, poor performance, or your league’s fantasy baseball waiver wire is barren, these undervalued pitchers could prove useful in the days ahead.

 

8/19: Dillon Gee (NYM) @ Minnesota Twins (Kyle Gibson)

rotoballer-fantasy-baseball-advice-dillon-geeCBS Ownership: 54%, Yahoo Ownership: 22%

We recommended Gee last week against the white-hot Dodgers, but made sure to attach a caveat about New York’s inability to produce much in the victory department. As things turned out, Gee allowed just two earned runs over six innings and left the game in line for a win, but the Mets’ bullpen blew the lead and the hard luck righty was left with a no-decision despite his fifth quality start in his past six appearances. Regardless of his supporting cast, Gee squares off against the weak-hitting Twins on Monday afternoon and should be started in most formats.

 

8/20: Rick Porcello (DET) vs. Minnesota Twins (Mike Pelfrey)

CBS Ownership: 62%, Yahoo Ownership: 21%

A perennial disappointment, Porcello has overcome a shaky start to the season by posting quality starts in seven of his past eight appearances dating back to late June. For some reason his consistency hasn’t moved the fantasy ownership needle too much, so take advantage: Porcello versus the Twins is as good an option as you could hope to find on the waiver wire at this critical point in the season.

 

8/20: Sonny Gray (OAK) vs. Seattle Mariners (Joe Saunders)

CBS Ownership: 34%, Yahoo Ownership: 18%

The recently called up Gray has been outstanding since joining the Oakland rotation, allowing just two earned runs over 14 IP with a 14:4 K:BB ratio in starts versus Toronto and Houston. A 2011 first-round pick, the slightly-built Vanderbilt product primarily relies upon an explosive four-seam fastball with movement in addition to a sharp breaking ball. Combined with good mechanics and an advanced pitching IQ, the young righty has been compared to Tim Hudson and Roy Oswalt. With Bartolo Colon headed to the DL, Gray will have a rotation spot for the foreseeable future and has a real chance to be a factor in the fantasy playoffs.

 

8/21: Jake Arrieta (CHC) vs. Washington Nationals (Ross Ohlendorf)

CBS Ownership: 7%, Yahoo Ownership: 1%

Arrieta has always possessed terrific stuff, but his inability to fully harness it is what ultimately led to the Orioles trading him to the Cubs back in early July. Sent to the minors to continue refining his game, Arrieta was terrific in a spot start versus Milwaukee on July 30th before totally dominating the Cardinals over seven shutout innings in another spot appearance on Friday. Arrieta has now all but sown up a chance to audition for a 2014 rotation spot, and that journey continues with a start against the Nationals on Wednesday night. The idea that Arrieta could hold deep league fantasy value down the stretch isn’t as far-fetched as you might think.

 

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If you want this article and other high-end fantasy baseball analysis delivered to you on a daily basis, sign up for our daily newsletter. And be sure to check out Rotoballer.com’s Fantasy Baseball Waiver Wire Pickups list for in-depth analysis on gems that you may be able to find sitting on your waiver wire.  It’s one of the best fantasy baseball features currently on web.

 




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REAL-TIME FANTASY NEWS

Chris Olave

Ruled Out for Week 18
Tom Wilson

Wraps Up 2025 With Gordie Howe Hat Trick
Valeri Nichushkin

Nets Second Career Hat Trick
Frank Vatrano

to Miss Six Weeks With Shoulder Injury
Conor Sheary

Noah Laba Exit With Injuries Wednesday
Brayden McNabb

Suffers Upper-Body Injury Wednesday
Miles Wood

Exits Early Wednesday
Gavin Brindley

Sustains Upper-Body Injury
Michael Porter Jr.

Battling Illness, Questionable Thursday
Joel Embiid

Likely to Play Thursday
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Available Thursday
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to Miss at Least One Week
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to Be Re-Evaluated in Two Weeks
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Jonas Valanciunas in Walking Boot After Suffering Calf Injury
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Expects to Play Next Game After Suffering Minor Knee Injury
Davante Adams

Not Expected to Play in Week 18
Stephon Castle

Active on Wednesday
Tyler Kolek

Elevated to Available on Wednesday
Tari Eason

Questionable Versus Brooklyn
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Not Expected to Suit Up on Thursday
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Available For Wednesday
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Alperen Sengun Questionable Versus Brooklyn
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Undergoes Groin Surgery
Zach Collins

Out at Least 10 More Days
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Unavailable Again on Wednesday
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Won't Play in Week 18
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Considering Playing Beyond 2025?
Sean Monahan

Sits Out Wednesday's Game
Zach Werenski

Misses Fourth Straight Game Wednesday
Dougie Hamilton

Questionable Wednesday
Radko Gudas

Expected to Remain Out Wednesday
Stefon Diggs

Expected to Play in Week 18
Ilya Lyubushkin

Back From One-Game Absence Wednesday
Alex Lyon

to Miss "Bit of Time"
Erik Cernak

Rejoins Lightning Lineup Wednesday
Christian McCaffrey

Trending to Play in Week 18
Kon Knueppel

To Make Return For Charlotte On Wednesday, In Starting Lineup
Jalen Hurts

Eagles Expected to Rest Jalen Hurts, Most Starters in Week 18
George Kittle

49ers Will be "Very Surprised" if George Kittle Doesn't Play on Saturday
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Ruled Out for Regular-Season Finale
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Lane Kiffin Interested in Sam Leavitt, Brendan Sorsby at LSU
Shakir Mukhamadullin

Questionable Wednesday
Adam Gaudette

Unavailable Wednesday
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Activated From Injured Reserve
Alex Lyon

Nursing Lower-Body Injury
William Karlsson

to Miss Olympics
Jack Eichel

a Game-Time Decision Wednesday
Jason Dickinson

Hurt Versus Islanders
Mitchell Robinson

Sits Out Wednesday's Game
Grayson Allen

Listed as Doubtful Wednesday
Mason Plumlee

Ryan Kalkbrenner, Mason Plumlee Remain Out Wednesday
Kon Knueppel

Likely to Return Wednesday
CFB

Deuce Knight Officially Entering Transfer Portal
CFB

Kewan Lacy Expected to Be Full-Go Against Georgia
Stefon Diggs

Facing Strangulation, Assault Charges
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Chip Kelly Named Northwestern Offensive Coordinator
Riley Leonard

Will Start Against the Texans
Bijan Robinson

Explodes for 229 Total Yards, Two Touchdowns on Monday Night
Davante Adams

Officially Out on Monday Night
Drake London

Active Against Rams
Justin Herbert

Won't Face Broncos in Week 18
Marcus Mariota

Considered "a Stretch" to Play in Week 18
Geno Smith

Dealing With Significant Ankle Injury
Dak Prescott

Will Play in Week 18
Lamar Jackson

Week 18 Status "to be Determined"
Joe Mixon

Won't Return This Season
T.J. Watt

a Long Shot to Play in Week 18?
CFB

Penn State Working to Hire D'Anton Lynn as Next Defensive Coordinator
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Omar Cooper Expected to be Full-Go for Rose Bowl
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Marcus Freeman Staying with Notre Dame for 2026 Season
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Star Wideout Cam Coleman Entering Transfer Portal
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Jay Hill Expected to be Next Michigan Defensive Coordinator

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