
Griffin Jax is a fantasy baseball waiver wire pickup for Week 21 of the 2021 MLB season. Consider adding the SP if he's a free agent in your leagues.
BALLER MOVE: Add in leagues of 14+ teams
ROSTERED IN: 2% of leagues
ANALYSIS: Don't pay too much attention to Jax's current 5.45 ERA and 1.211 WHIP. After getting off to a rough start this year out of the bullpen followed by a disastrous first start, Jax has been pitching very well over his last four starts, going 2-0 with a 2.66 ERA, 0.787 WHIP and 23.1 percent strikeout rate over 20 1/3 innings of work. He'll open up the week against Cleveland, as they have averaged 3.7 runs per game while slashing .251/.306/.382 over their last 10 games. It will be his first time facing them since joining the rotation, and he'll be helped by the fact that they have been hitting worse on the road (.227/.290/.388) than at home (.237/.307/.410). He'll then close out the week in New York, facing a red-hot Yankees squad that is slashing .272/.351/.439 while averaging 6.1 runs per game over their last 10 games. Jax should have a decent matchup with the Yankees though, as they are both hitting worse against right-handed pitching (.228/.318/.379) and hitting worse at home (.233/.328/.396).
Jax is a pitcher on the rise, and likely will be one of the best guys to choose in deeper formats this week.. Managers should pick him up in most formats to use him as a streamer this week, and if he puts up the results I expect out of him, go ahead and keep him rostered full time as he should be a good pitcher to have down the stretch into the playoffs.
More Fantasy Baseball Waiver Wire Pickups

Christian Moore - Fantasy Baseball Prospects Waiver Wire Stashes (Week 12)
BALLER MOVE: Add in 12-team leagues CALL-UP ETA: Now ANALYSIS: On Thursday evening, the Angels announced they were promoting their top-ranked prospect, infielder Christian Moore, to the major leagues. Moore was selected with the eighth pick in last year's draft out of Tennessee. Moore wasted little time making an impact as he made his Double-A debut […]

Andrew Painter - Fantasy Baseball Prospects Waiver Wire Stashes (Week 11)
BALLER MOVE: Add in 12-team leagues CALL-UP ETA: June ANALYSIS: Philadelphia Phillies right-handed pitching prospect Andrew Painter should continue to be viewed as a top stash option. After recovering from Tommy John and missing the entirety of the 2023 and 2024 seasons, Painter has returned to the bump this season and is fast approaching his MLB […]

Zebby Matthews - Fantasy Baseball Prospects Waiver Wire Stashes (Week 11)
BALLER MOVE: Add in 12+ team leagues CALL-UP ETA: June ANALYSIS: Zebby Matthews was one of the most interesting pitching prospects coming into this season and delivered solid outings before going down with a shoulder injury. Matthews has not been particularly impressive in his two major league stints so far, but his minor league success and […]

Quinn Mathews - Fantasy Baseball Prospects Waiver Wire Stashes (Week 11)
BALLER MOVE: Add in 12+ team leagues CALL-UP ETA: June ANALYSIS: St. Louis Cardinals pitching prospect Quinn Mathews was a popular name in this column during the opening month of the campaign, but suffered a shoulder injury. However, Mathews is back in action and remains on a trach to reach the majors this season. In his […]

Carson Whisenhunt - Fantasy Baseball Prospects Waiver Wire Stashes (Week 11)
BALLER MOVE: Add in 14-team leagues CALL-UP ETA: June ANALYSIS: San Francisco Giants left-handed pitching prospect Carson Whisenhunt continues to impress at Triple-A and is quickly approaching his MLB debut. The top-ranked prospect in the system opened the campaign by earning his second look at Triple-A. In 2024, Whisenhunt made his Triple-A debut but struggled, logging […]
Download Our Free Waiver Wire App
Like what you see? You can download our free fantasy baseball mobile app for iPhone and Android which includes more waiver wire recommendations at every position, 24x7 player news, notifications, injury alerts & daily articles.
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!