Siena vs Duke – Best Picks & Odds for NCAA Tournament Opener

Published: March 19, 2026 at 12:02 pm EDT

Cameron Boozer leads Duke into the NCAA Tournament. — Mar 14, 2026; Charlotte, NC, USA; Duke Blue Devils guard Nikolas Khamenia (14) and guard Dame Sarr (7) and forward Cameron Boozer (12) and guard Cayden Boozer (2) react at the end of the men's ACC Conference Tournament Championship at Spectrum Center. Mandatory Credit: Bob Donnan-Imagn Images

Why an unranked underdog is poised to cover a massive 28.5-point spread against the AP No. 1 overall seed
Sharp money is aggressively targeting the Under 135.5, fading the public opinion
Our internal analysis reveals the best bets for Duke vs. Siena today in the NCAA Tournament

ACC champion and top overall seed Duke begins its banner hunt today against No. 16 seed Siena in the opening round of the NCAA Tournament. Tip-off is set for 2:50 pm, ET, in Greenville, SC, with CBS providing national coverage.

Oddsmakers aren’t expecting the third 16 vs. 1 upset in NCAA Tournament history; the Blue Devils are 28.5-point favorites to advance in the South Region. You can track the tournament, of course, with our printable March Madness bracket.

Cameron Boozer makes his NCAA Tournament debut today, but he’s not the only reason Duke has favorable March Madness championship odds.

Siena won the MAAC Tournament to secure its first NCAA Tournament appearance since 2010.

Interestingly, both head coaches won this title as a player: Duke’s Jon Scheyer helped the Blue Devils win in 2010, and Siena’s Gerry McNamara was a key part of Syracuse’s 2003 title run with Carmelo Anthony.

The spread is massive today, but our analysis breaks down the best bets for Duke vs. Siena in the opening round of the NCAA Tournament.

Duke vs Siena Betting Picks, Predictions & Best Bets

Laying nearly 30 points in a neutral-site environment is a mathematically daunting proposition, even when backing the top-ranked team in the nation. The consensus handicap opened with Siena catching 26.5 points, but early public inflation has pushed the line to an imposing 28.5. Stepping in front of a dominant tournament favorite is uncomfortable, but the data strongly supports fading the inflated number.

Siena has been flawless when playing outside of their home arena this season, boasting a perfect 5-0 straight-up record in neutral-site contests. Furthermore, tournament blowouts traditionally feature late-game deceleration. When a top-tier program builds a 20-plus point lead, preserving legs for the Round of 32 takes precedence over extending the margin.

Boozer will get his. There’s a reason his March Madness Most-Outstanding Player odds are so favorable. But Duke’s rotation will inevitably shorten, opening the backdoor for a scrappy underdog to secure the cover before the buzzer.

The Spread Pick: Siena +28.5 (-110 at Bet365)

O/U Prediction: Under 135.5 ($0.49 per contract at Kalshi)

Prediction site Kalshi offers multiple totals on today’s game. Each contract is offered at a different price point.

Our analysis points to this contract, which, at $0.49 per equates to +104 odds. A $20 investment in the Under 135.5 points contracts would produce a $21 profit if the teams stay below 136 points.

Here’s why our primary total play targets the Under 135.5. The consensus market opened at 136.5 before early sharp money drove it down a full point. Siena ranks 15th nationally in scoring defense, meaning it plays a grinding, physical style that naturally limits possessions. With an implied team total of just 53.5 points for the underdog, the game script projects a stifling defensive showcase from Duke. If the MAAC champions struggle to eclipse the 50-point threshold, Duke would need to push into the high-80s to threaten the Over—a pace it is unlikely to maintain in a blowout scenario.

(If you don’t have an account at Kalshi, no worries. Just click “PREDICT” in the graphic below to claim SBD’s Kalshi referral code.)

Prediction Markets

Duke vs Siena

Learn more about Prediction Markets

Kalshi

Duke

98%

Siena

Predict

Public Betting Splits and Sharp Money Analysis

Analyzing the college basketball public betting handle distribution provides a clear window into how the market is attacking this lopsided post-season matchup. By isolating the stake percentage (actual money wagered) from the ticket percentage, we can identify exactly where the sophisticated syndicates are deploying their capital.

Spread Betting: Consensus on the Underdog

Bettors across the spectrum are entirely aligned on the spread. The ticket data reveals that 79.9% of spread wagers are backing Siena, accompanied by a nearly identical 78.05% of the total handle. Duke is drawing just 20.1% of the tickets and 21.95% of the stake. Both casual players and large-bankroll sharps agree that spotting 28.5 points in the first round is a mathematical overextension by the sportsbooks.

Total Betting: Fading the Public Noise

While our spread prediction aligns with the consensus, our Under 135.5 selection directly fades massive public volume. An overwhelming 93.45% of tickets and 92.66% of the total money are hammering the OVER. The post-season public inherently roots for points, creating an artificially inflated total. The UNDER is commanding a microscopic 6.55% of tickets and 7.34% of the cash, making this a premier contrarian spot backed by projected game script rather than public sentiment.

Moneyline: Textbook Sharp vs. Public Standoff

The moneyline market presents a classic sharp-versus-public discrepancy. A staggering 91.7% of moneyline tickets are treating Duke as a free square in exotic parlays. However, the actual monetary volume flips the script entirely. Duke holds only 30.07% of the overall stake. Conversely, Siena commands just 8.3% of the tickets but an incredible 69.93% of the total moneyline cash. When ticket volume heavily favors one side ( > 60%) but the handle heavily favors the opposite side ( > 60%), it is a definitive indicator that sharp bettors are taking high-dollar, low-risk fliers on the astronomical underdog odds.

Siena vs Duke Odds

Moneyline: Duke -25000 | Siena +4950
Point Spread: Duke -28.5 (-104) | Siena +28.5 (-116)
Total (Over/Under): 135.5 (Over -115 | Under -105)

Odds as of March 18, 2026, at 2:04 PM UTC from consensus odds.

The betting markets have positioned Duke as a practically insurmountable -25000 moneyline favorite. Stripping away the sportsbook’s vigorish reveals the true probability of this David versus Goliath outcome. The vig-free normalized probabilities grant Duke an overwhelming 98.05% chance of advancing, leaving Siena with a microscopic 1.95% implied probability of pulling off the outright upset.

To quantify this from a bankroll perspective, a standard $10 moneyline wager on the heavy favorites yields a negligible $0.04 in profit, resulting in a total payout of $10.04. In contrast, for bettors deploying sharp capital on the miracle scenario, a $10 moneyline wager on the underdog returns a massive $495.00 in pure profit, leading to a $505.00 total payout if the monumental upset materializes.

Kalshi also has moneyline markets. A Duke to win contract is $0.99 per, which equates to -9900 odds. Siena to win contracts are trading for $0.02, or +4900 odds. If you invest $20 in Siena to win contracts and the Saints pull off the miracle upset, you would profit $1,000.

Chris Wright

A 30-time APSE award-winning editor with previous stints at the Miami Herald, The Indianapolis Star and News & Observer, Chris Wright is an Evergreen and AI editor for Saturday Down South, Saturday Tradition, Crossing Broad, Sports Betting Dime and ESNY.

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