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Read Article NBA Playoffs player props today: Monday's best props include Stephon Castle [5/18/2026]
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Written by Jason Bevilacqua, Head of Content and Communities
Get NBA player props today with projections for Monday's games.
Dimers' NBA props are live for May 18, 2026, with today's top prop bets led by the likes of Stephon Castle, Devin Vassell and Jalen Williams.
Our NBA player props model runs continuously, analyzing every Playoffs matchup, including today's Spurs vs. Thunder clash, to surface the best NBA player prop bets across the market.
List of NBA prop bets for Monday's playoffs, 5/18
Below are the top 6 NBA player props for May 18, ranked by probability.
Stephon Castle over 6.5 assists (+118)
- Edge: 7.5%
- Probability: 53.4%
- Projection: 7.1
- Game: Spurs vs. Thunder (8:30PM ET)
Our model has found value on San Antonio's Stephon Castle over 6.5 assists. A probability of 53.4% gives this play an edge of 7.5% at +118 odds.
Devin Vassell over 4.5 rebounds (+124)
- Edge: 6.3%
- Probability: 50.9%
- Projection: 4.7
- Game: Spurs vs. Thunder (8:30PM ET)
Devin Vassell’s rebounds prop shows a 6.3% edge at +124 odds, according to our model, which projects him for 4.7 rebounds on the over 4.5 line.
Jalen Williams over 4.5 rebounds (+123)
- Edge: 5.5%
- Probability: 50.3%
- Projection: 4.6
- Game: Spurs vs. Thunder (8:30PM ET)
The data highlights value on Jalen Williams over 4.5 rebounds, with simulations showing a 50.3% probability and a 5.5% edge at +123.
De'Aaron Fox over 1.5 steals (+172)
- Edge: 8.9%
- Probability: 45.6%
- Projection: 1.2
- Game: Spurs vs. Thunder (8:30PM ET)
Our model projects De'Aaron Fox to put up 1.2 steals today, creating an edge of 8.9% on the over 1.5 line at +172 odds.
Victor Wembanyama under 0.5 steals (+172)
- Edge: 5.5%
- Probability: 42.2%
- Projection: 1.1
- Game: Spurs vs. Thunder (8:30PM ET)
Simulations indicate value on Victor Wembanyama under 0.5 steals for San Antonio, showing an edge of 5.5% at +172 odds.
Jalen Williams under 0.5 steals (+176)
- Edge: 5.4%
- Probability: 41.7%
- Projection: 1.1
- Game: Spurs vs. Thunder (8:30PM ET)
Jalen Williams’s steals prop shows an edge of 5.4% at +176 odds, according to our model, which projects him for 1.1 today.
NBA player prop summary: Monday, May 18, 2026
A quick summary of today’s top props by probability according to our model as of 7:49PM ET:
| Prop | Odds | Edge | Probability |
|---|---|---|---|
| Stephon Castle over 6.5 assists | +118 @ FanDuel | 7.5% | 53.4% |
| Devin Vassell over 4.5 rebounds | +124 @ FanDuel | 6.3% | 50.9% |
| Jalen Williams over 4.5 rebounds | +123 @ BetRivers | 8.9% | 45.6% |
| De'Aaron Fox over 1.5 steals | +172 @ DraftKings | 8.9% | 45.6% |
| Victor Wembanyama under 0.5 steals | +172 @ DraftKings | 5.5% | 42.2% |
| Jalen Williams under 0.5 steals | +176 @ DraftKings | 5.4% | 41.7% |
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Conclusion
For May 18, 2026, our NBA prop bets feature players such as Stephon Castle, Devin Vassell and Jalen Williams. Each pick is grounded in real-time data and advanced simulations to help you bet with clarity and purpose.
Built using automation and human oversight, this article draws on the latest data to deliver accurate, timely insights. If using this article for betting, Dimers encourages responsible gambling.
Jason Bevilacqua, an expert in MLB, NHL, NBA, MLS, and NFL, delivers game previews, best bets, and props. Since 2020, as Head of Social and Community at Dimers, he has contributed insightful articles utilizing data-driven models and simulations.
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