No. 16 seed Siena enters the NCAA Tournament's opening round as a 27.5-point underdog against No. 1 seed Duke at a neutral site in Greenville, South Carolina. The Blue Devils are the nation's top-ranked team in both polls and boast the country's best adjusted defensive efficiency, but the spread suggests a historic blowout. Does the market have this right, or is there value on the MAAC champion Saints?
Siena vs Duke Betting Preview
Duke opened as a 27.5-point favorite with a total sitting at 135.5, and the efficiency gap supports the lopsided number. The Blue Devils rank No. 1 nationally in adjusted net rating at +41.6, while Siena checks in at No. 189 with a -1.7 mark. That 43.3-point chasm is the widest you'll see in any NCAA Tournament matchup, and it reflects Duke's elite two-way dominance. The Blue Devils rank No. 4 in adjusted offensive efficiency (129.2) and No. 1 in adjusted defensive efficiency (87.6), creating a nightmare scenario for a Siena offense that ranks just No. 197 nationally in adjusted offensive rating.
The model projects Duke to win by 13.9 points with a total of 139.0, suggesting the market may be overvaluing the blowout narrative. Siena's 20-14 ATS record and 11-8 road ATS mark indicate the Saints have covered more often than not this season, and Duke has struggled to cover as heavy favorites, going just 19-14-1 ATS overall. The total leans toward the over based on the model's projection, but the pace dynamic—Siena plays at a crawl (61.4 possessions per game, No. 360 nationally)—could suppress scoring opportunities.
Game Information & Betting Odds
- Date: Thursday, March 19, 2026
- Time: 2:50 PM ET
- Location: Bon Secours Wellness Arena, Greenville, SC
- Tournament: NCAA Tournament (Round of 64)
- Seeds: No. 16 Siena vs No. 1 Duke
- Spread: Duke -27.5 (DraftKings)
- Total: 135.5 (DraftKings) / 136 (Bovada)
- Moneyline: Duke -20000 / Siena +3500
The Matchup
The single most decisive factor in this game is Duke's defensive suffocation against Siena's limited offensive firepower. The Blue Devils allow just 39.2% from the field (No. 8 nationally) and 30.4% from three (No. 25), while Siena shoots 30.4% from deep (No. 338) and generates just 107.6 adjusted offensive efficiency. Duke's defensive rating of 87.6 is the best in the country, and the Saints have no clear path to exploiting it. Justice Shoats (12.7 PPG, 5.3 APG) is Siena's primary playmaker, but he'll face constant ball pressure from a Duke defense that forces turnovers at a 18.1% clip and ranks No. 85 in steals per game.
Siena's best hope is to slow the game to a halt and grind possessions into the dirt. The Saints rank No. 360 in pace (61.4 possessions per game), which should keep the total manageable even if Duke dominates efficiency. The projected pace blend of 64.1 possessions favors Siena's preferred tempo, and the Saints have held opponents to 65.7 PPG this season (No. 15 nationally in points allowed). If Siena can limit transition opportunities and force Duke into half-court sets, the margin might stay within reason.
Duke's offensive advantage is equally overwhelming. Cameron Boozer (23.0 PPG, 9.9 RPG) is the Blue Devils' engine, ranking No. 3 nationally in scoring and anchoring a frontcourt that dominates the glass. Duke pulls down 40.3 rebounds per game (No. 14) and owns a 38.1% offensive rebounding rate (No. 8), creating second-chance opportunities that Siena cannot afford to surrender. The Saints rank No. 232 in rebounds per game and No. 238 in offensive rebounding percentage, and Duke's size advantage—averaging 79.34 inches in height compared to Siena's 76.73—will be punishing in the paint.
Injuries complicate both sides. Siena is without key contributors Tasman Goodrick (10.4 PPG, 7.8 RPG) and Tajae Jones, both sidelined long-term. Duke is missing Caleb Foster (9.2 PPG), who fractured his foot earlier this month. Foster's absence removes a secondary playmaker, but Duke's depth—34.6% bench minutes compared to Siena's 24.3%—allows the Blue Devils to absorb the loss more easily.
The turnover battle should favor Duke. Both teams post similar turnover rates (Siena at 16.0%, Duke at 15.7%), but Duke's assist-to-turnover ratio of 1.59 edges Siena's 1.30, and the Blue Devils generate more scoring off turnovers (480 points compared to Siena's 415). Duke's defensive pressure should create extra possessions, and the Saints' limited shooting efficiency means they cannot afford to waste opportunities.
Prediction
Duke should control this game from the opening tip, but Siena's glacial pace and disciplined defensive structure could prevent a complete runaway. The Saints rank No. 15 in points allowed per game and No. 66 in opponent field goal percentage, and they've shown the ability to grind out low-scoring affairs. Duke's recent history against the spread—failing to cover in three of their last five games—suggests the Blue Devils may not bury an overmatched opponent the way the market expects.
The model's 13.9-point projection is difficult to reconcile with a 27.5-point spread, even in a first-round NCAA Tournament mismatch. Siena's ATS record (20-14) and Duke's inconsistent covering as heavy favorites create a case for the underdog. The total projects slightly over 135.5, but the pace dynamic and Siena's defensive grind could keep scoring in check.
Final Score Prediction: Duke 74, Siena 59
Best Bet: Siena +27.5. The spread feels inflated for a tournament game where the underdog has every incentive to slow the tempo and limit possessions. Duke wins comfortably, but Siena keeps it closer than the market suggests.