Mason Miller is a fantasy baseball waiver wire pickup for pitchers heading into Week 5 (2023). Target Miller as a free agent pitcher on the waiver wire.
BALLER MOVE: Add in 10+ Team Leagues
ROSTERED IN: 30% of Leagues
ANALYSIS: Going into the season, very few people thought Oakland’s fourth-ranked prospect pitcher Mason Miller would make his major league debut only one month into the season. Miller started the 2023 season at Double-A. Many expected that assignment; injuries had limited him to just 20 innings of minor-league ball.
After striking out eight in under four innings in his first start at Double-A, the Athletics pushed him to Triple-A. In his first Triple-A start of 2023, he threw 11 strikeouts across five innings and was called up to The Show to try to stabilize a struggling Oakland rotation.
That ascension is a testament to his’s elite arsenal.
Mason Miller vs Patrick Wisdom.
Look at this stuff. It's totally Ridiculous. 😳
Slider in the dirt/Sword
Slider outer third/Buckle
102mph Sword/Foul
102mph with sink/run/ball
Then blows him away with elevated 102 ⛽️ pic.twitter.com/PKmx4auunw— Rob Friedman (@PitchingNinja) April 19, 2023
His fastball is his star pitch. The four-seamer accounts for 62% of his pitches at the MLB level. It averages 99 mph and regularly reaches triple digits on the radar gun. In his major-league debut, he became only the tenth player in the Statcast era to touch 100 mph over 15 times. Through two starts, his four-seamer has a .249 wOBA.
His slider is also well-regarded. It averages nine inches of horizontal break and currently has an opponent batting average of .200. His brand-new cutter hasn’t fared so well. On 24 pitches and four plate appearances, the pitch has a .669 wOBA. While it may need some work, it tunnels well and could become just as dangerous as his slider and four-seamer with some development.
With how impressive he has looked at the major league, you wouldn’t think he has a 6.48 ERA. A 1.79 FIP should explain the situation. Behind Miller stands an Oakland defense that already has -23 defensive runs saved. The risk of rostering Miller is entirely unrelated to Miller himself, but it’s still a risk. He won’t have any run support, and he’ll have a historically poor defense.
Despite that, the Athletics front office will keep the rookie up at the major-league level for the entire year. The lack of run support and quality defense will be incredibly frustrating, but his ceiling is unmatched. He is worth rostering in most leagues.
More Fantasy Baseball Waiver Wire Pickups

Craig Yoho - Fantasy Baseball Waiver Wire Pickups and Prospect Stashes (Week 4)
BALLER MOVE: Add in 12+ Team Leagues ROSTERED IN: 3% of Leagues ANALYSIS: The Milwaukee Brewers called up their No. 18-ranked prospect, Craig Yoho, ahead of their series opener against the San Francisco Giants on Monday. Yoho has quickly risen up the minor league ranks since being drafted in the eighth round of the 2023 MLB Draft. […]

Nick Kurtz - Fantasy Baseball Waiver Wire Pickups and Prospect Stashes (Week 4)
BALLER MOVE: Add in All Leagues ROSTERED IN: 31% of Leagues ANALYSIS: After weeks of wondering when the Athletics would call up their top prospect, they are finally expected to promote first baseman Nick Kurtz to their major league roster on Monday evening. Kurtz was drafted fourth overall in the 2024 MLB Draft and is currently MLB […]

Logan Henderson - Fantasy Baseball Waiver Wire Pickups and Prospect Stashes (Week 4)
BALLER MOVE: Monitor in 12+ Team Leagues ROSTERED IN: 3% of Leagues ANALYSIS: The Milwaukee Brewers called up their No. 12 prospect, Logan Henderson, earlier this week to give the team another fresh arm. The Brewers are dealing with injuries to Nestor Cortes (elbow), Aaron Civale (hamstring), Brandon Woodruff (shoulder), and Tobias Myers (oblique) early in the […]

Edgar Quero - Fantasy Baseball Waiver Wire Pickups and Prospect Stashes (Week 4)
BALLER MOVE: Add in 15+ Team / Two-Catcher Leagues ROSTERED IN: 1% of Leagues ANALYSIS: The Chicago White Sox called up their No. 6 prospect, Edgar Quero, on Thursday afternoon to make his MLB debut. Quero was acquired by the White Sox at the 2023 trade deadline in the deal that sent both Lucas Giolito and Reynaldo […]

Caleb Durbin - Fantasy Baseball Waiver Wire Pickups and Prospect Stashes (Week 4)
BALLER MOVE: Consider in 12+ Team Leagues ROSTERED IN: 6% of Leagues ANALYSIS: The Milwaukee Brewers have promoted infielder Caleb Durbin, who MLB Pipeline ranked as their No. 21 prospect coming into the season. Durbin will make his MLB debut on Friday night, batting ninth against J.T. Ginn and the Athletics. Before the game, manager Pat […]
Download Our Free News & Alerts Mobile App
Like what you see? Download our updated fantasy baseball app for iPhone and Android with 24x7 player news, injury alerts, sleepers, prospects & more. All free!

Check out RotoBaller's entire fantasy baseball waiver wire pickups and sleepers list, updated daily!