NCAA First Round Siena vs Duke: Preview, Prediction and Top Prop Bets

Date: Thursday, March 19, 2026 | Time: 7:10 PM ET Location: Bon Secours Wellness Arena, Greenville, SC | TV: CBS

Betting Line: Duke -24.5 | Over/Under: 149.5

The Matchup Context: Blue Blood Dominance vs Mid-Major Belief

The #1 Duke Blue Devils enter the NCAA Tournament as the overall No. 1 seed and national title favorite, a reflection of their dominant 2025–26 season.

Head coach Jon Scheyer has built a powerhouse roster led by freshman superstar Cameron Boozer, one of the most dominant players in college basketball. Boozer has been the engine of Duke’s offense, averaging over 22 points and 10 rebounds per game while anchoring both ends of the floor.

Duke’s supporting cast—featuring elite young talent like Cayden Boozer and Isaiah Evans—gives them one of the deepest and most explosive lineups in the country.

Across the floor, the #16 Siena Saints arrive as MAAC champions under head coach Gerry McNamara. Siena earned their tournament bid with a conference title run and is led by guard Gavin Doty, who averages nearly 18 points per game and was named MAAC Tournament MVP. Check out the Top Sports Betting Sites.

This is a classic 1 vs 16 matchup:

• Duke → elite talent, depth, and efficiency

• Siena → confidence, momentum, and nothing to lose

Top 4 Prop Bets

Here are the Top 4 prop bets for today’s NCAA Tournament matchup.

Prop Bet #1: Cameron Boozer Over 21.5 Points

Caesars

4.4/5

Tip: Cameron Boozer Over 21.5 Points

• Primary Star
• High Usage
• Interior Dominance

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Boozer is Duke’s offensive centerpiece and should dominate this matchup.

Against a smaller Siena frontcourt, he has a massive advantage inside. Boozer is the favorite to win MOP of the Tournament.

EV Trigger: Strong value at 21.5 points.

Prop Bet #2: Gavin Doty Over 17.5 Points

Doty is Siena’s go-to option and will need to carry the offense.

Even in a loss, his usage rate should remain extremely high.

EV Trigger: Playable up to 19.5.

Prop Bet #3: Duke Team Total Over 86.5

BetMGM

4.5/5

Tip: Duke Team Total Over 86.5

• Elite Offense
• Depth
• Mismatch Advantage

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Open BetMGM

Duke’s offensive efficiency and depth should overwhelm Siena.

Expect scoring runs fueled by transition and second-chance opportunities.

EV Trigger: Strong value against mid-major defense.

Prop Bet #4: Game Total Over 149.5

DraftKings

4.5/5

Tip: Over 149.5 Total Points

• Blowout Pace
• Transition Points
• Depth Scoring

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Open DraftKings

Even in a lopsided game, Duke’s tempo and scoring depth can push the total over.

If Siena contributes offensively, this number becomes very reachable.

EV Trigger: Playable up to 152.

Keys to the Game

For Duke to Win

• Control the paint with Boozer • Push tempo and create easy baskets • Avoid complacency early

For Siena to Win

• Shoot at a high percentage from deep • Limit turnovers against pressure • Play with pace and confidence

Betting Odds & Analysis

Spread: Duke -24.5 Total: 149.5

This is one of the largest spreads of the first round—and for good reason.

Duke has a massive talent, size, and depth advantage. However, big spreads in tournament games can create backdoor cover opportunities, especially if the favorite pulls starters late.

The key betting angle revolves around tempo and Duke’s offensive ceiling. Make sure you know all about March Madness Bracket betting.

The Verdict

Prediction: Duke 92, Siena 68

Best Value Bet: Duke Team Total Over 86.5

Duke’s talent and depth should be overwhelming from the opening tip. Siena will compete early behind Gavin Doty’s scoring, but the size and athleticism gap will become too much to overcome.

Expect a comfortable Duke win—but with enough scoring to make the over very live.