MLB Strikeout Props Today September 21st, 2026: Best Pitcher K Picks, Predictions & Odds
Monday's slate is headlined by an AL East series where both starters carry real question marks, with a top prospect making his first start back from knee surgery on a strict pitch count and the opposing starter still shaking off a scary comebacker to the elbow. Elsewhere, a Twins righty riding his best stretch of the season gets a strong recent matchup. The fade of the day involves a modest-strikeout Giants rookie running into a red-hot, contact-heavy Twins lineup that just put up 13 hits and an 8-0 win a day earlier.
For the full up-to-the-minute board, run these matchups through our Daily Strikeout Prop Finder and shop the market with our MLB Odds Finder before locking anything in. Let's get into today's best MLB strikeout picks.
Best MLB Strikeout Props Today
Trey Yesavage Over 3.5 Strikeouts (+132)
Yesavage returns tonight from left knee surgery that has sidelined him since early August, and the Blue Jays plan to limit him to roughly three innings and 45-to-50 pitches in his first outing back, with reliever Spencer Miles ready to cover the rest of the game. His lone rehab appearance at Triple-A Buffalo was a rough one, lasting less than a full inning on 34 pitches, adding some uncertainty to exactly how sharp he'll look tonight. Even so, his 23.6 percent strikeout rate on the season is a step above average, and Baltimore carries a 25.3 percent strikeout rate against right-handed pitching that has climbed to an elite 28.7 percent over the last two weeks, one of the best matchup numbers on the entire board. That combination of a genuinely favorable, trending-hotter opponent and a modest bar of just four strikeouts in a short outing gives him a real path to clearing this number even with the workload restriction. Get it in.
Shane Baz Under 3.5 Strikeouts (-150)
Baz was drilled in the elbow by a comebacker in his last start against the Mets and had to be removed early, and while he's been cleared to make his next turn, the recent scare adds real uncertainty about his sharpness tonight. He has been rocked over his last two outings regardless, allowing eight runs on 13 hits with just seven strikeouts against three walks in that stretch, numbers that have pushed his season ERA to 4.11 across 30 starts. Toronto carries just an 18.1 percent strikeout rate against right-handed pitching for the season that has stayed nearly identical at 18.0 percent over the last two weeks, one of the least strikeout-prone lineups in baseball on either timeframe. That combination of recent injury uncertainty, poor recent form, and a genuinely contact-oriented opponent makes the under the smarter side of this number. Take the under.
Zebby Matthews Over 4.5 Strikeouts (-114)
Matthews struck out eight batters over six scoreless innings against the Yankees in his last start, marking his fourth gem over his past six outings even amid an inconsistent overall season that has him at 9-10 with a 4.74 ERA. San Francisco carries a 22.4 percent strikeout rate against right-handed pitching for the season that has climbed to an elite 27.3 percent over the last two weeks, one of the better matchup numbers on today's board. That combination of a dominant recent stretch and a genuinely elite, trending-hotter opponent gives him a real path to clearing this modest number. Lock it in.
Pitcher Strikeout Projections vs Betting Lines
Every strikeout prop on the board gets measured against season-long performance, recent form, and opponent tendencies before it ever makes this column. Betting lines move for a reason, and our job is to find where the market has not fully priced in a matchup edge. That is the foundation of every pick you see above.
Highest Strikeout Upside Pitchers Today
- Trey Yesavage — 23.6% K rate, 8.7 K/9
- Zebby Matthews — 20.5% K rate, 7.7 K/9
- Shane Baz — 20.5% K rate, 7.9 K/9
- Blade Tidwell — 18.9% K rate, 7.1 K/9
Best Matchups For Strikeouts Today
RHP getting favorable matchups (season / L14):
- Trey Yesavage vs BAL (25.3% season / 28.7% L14)
- Zebby Matthews vs SF (22.4% season / 27.3% L14)
- River Ryan vs WSH (21.4% season / 22.6% L14)
- Blade Tidwell vs MIN (20.4% season / 22.3% L14)
Strikeout Props to Avoid Today
Blade Tidwell vs Minnesota
Tidwell was actually sharp in his last outing against St. Louis, allowing two runs on three hits over 6.2 innings, but that kind of efficient run prevention has not come paired with big strikeout totals given his modest 18.9 percent strikeout rate and 7.1 K/9 on the season. He carries a 2-3 record and 5.53 ERA overall, and Minnesota's strikeout rate against right-handed pitching sits at a fair but unremarkable 20.4 percent for the season that has ticked up only slightly to 22.3 percent over the last two weeks. The bigger concern is a Twins offense that has been rolling into this series, having just pounded out 13 hits in an 8-0 win on Sunday, a deep, red-hot lineup that has been squaring up mistakes and putting the ball in play rather than chasing. Even a well-pitched game from Tidwell is unlikely to produce a big strikeout total against a lineup this locked in on contact right now. Leave it alone.
Today's Best MLB Strikeout Parlay (+626)
Stack the three picks above into a same-game parlay, and you are looking at combined plus money value across a slate that leans in different directions across the board.
| Pitcher | Team | Opponent | Line | Target Pick | Odds | Season ERA | Season Record |
| Trey Yesavage | TOR | BAL | 3.5 | Over | +132 | 3.65 | 6-5 |
| Shane Baz | BAL | TOR | 3.5 | Under | -150 | 4.11 | 6-15 |
| Zebby Matthews | MIN | SF | 4.5 | Over | -114 | 4.74 | 9-10 |
