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Today's best MLB strikeout prop bets and pitcher K props for Saturday, May 9. Kipp Heisterman's expert MLB player prop picks, betting odds, and advanced stat analysis to help you win.
Welcome back to another edition of RotoBaller's MLB Strikeout Props! We have a full slate of games, as is typically the case on Saturdays when I write up this piece. There are a ton of great options for strikeouts on today's slate, which is not always the case, however.
I'll offer up a few of my top picks here today, but you'll need to grab a premium pass to see all five of my favorite K prop wagers. Our top MLB writers are posting their favorite props on Discord daily, so gain additional access to those picks with a premium RotoBaller membership.
In this article, I'll provide my favorite prop bets for MLB games on Saturday, May 9, 2026. Odds will change during the day, so lock in those bets as early as possible and always shop for the best number across multiple sportsbooks or prediction markets! If you love betting on baseball, check out our premium betting tools here at RotoBaller and sign up to access all our daily premium content!
High-Confidence Strikeout Picks
Chase Burns OVER 6.5 strikeouts (-135 Hard Rock)
Chase Burns arguably has the most strikeout upside on the slate today, so he certainly needs to be included as an over candidate here. He has struck out seven or more batters in three straight starts and in five of seven total starts this season. More importantly, he is posting a 34.8% whiff rate, which ranks in the 95th percentile.
Additionally, Burns has posted a 28.6% K rate thus far in 2026, which ranks in the 85th percentile. The matchup against the Astros is also surprisingly good, despite their perception as a team that does not strike out much. Over the previous two weeks, Houston has posted a 24.9% K rate versus right-handed pitching, which ranks them fourth-worst in the league over that span.
Houston is also posting just a 5.5% walk rate against righties over this same span, so Burns is less likely to get into trouble via the walk in this matchup, which is another reason to get on board here.
Braxton Ashcraft OVER 4.5 strikeouts (-135 Hard Rock)
It may seem odd that Ashcraft is listed under the high-strikeout category, but he has been racking up the punchouts and now has seven or more strikeouts in four of his previous six starts. The metrics also look good for Ashcraft, as he is posting a whiff rate of 30.1%, which ranks in the 81st percentile.
Ashcraft is also posting a K rate of 27.3% and a chase rate of 32.8%, both of which rank in the 73rd or better percentile. The matchup against the Giants is on the road; however, it is a pretty solid one for him. Over the previous two weeks, the Giants have been striking out at a clip of nearly 22% versus right-handed pitching.
The Giants are also posting just a 5% walk rate and a wRC+ mark of 91, both of which rank them in the bottom half of the league, and the walk rate is actually ranked dead last in the league. Playing Oracle Park, which suppresses runs, could actually be a major benefit for Ashcraft and help him get over the hump here.
Value Plays and "Under" Targets
