March Madness Over/Under Betting History: Over’s Struggles Reach New Low in 2023
BetMGMThe over has sucked in 2023 March Madness betting. Entering the second round, the over has hit in just nine of 35 tournament games.
If you bet $100 on the over in each of those 36 games, you would’ve lost more than than $1,800 ROI of -52.3%.
It’s the continuation of a trend – albeit at a dramatically worse rate – for over betting in the NCAA Tournament.
March Madness Over/Under Betting History
Since 2018, the over is 128-171 (.428) in tournament games. In four of those five tournaments, the over’s ROI was -10% or worse.The over hasn’t had a profitable tournament since 2017 (+16%), one of only three tournaments since 2005 with an ROI of +1% or better.
| Year | Over Record | ROI |
| 2023 | 9-27-0 | -52.3% |
| 2022 | 31-36-0 | -11.8% |
| 2021 | 26-38-2 | -21.2% |
| 2019 | 33-33-1 | -3.9% |
| 2018 | 29-37-1 | -16.0% |
| 2017 | 40-26-1 | 16.0% |
| 2016 | 35-32-0 | 0.9% |
| 2015 | 30-34-3 | -9.7% |
| 2014 | 35-32-0 | 0.5% |
| 2013 | 34-33-0 | -1.4% |
| 2012 | 25-41-1 | -26.2% |
| 2011 | 31-33-3 | -5.4% |
| 2010 | 29-34-1 | -11.3% |
| 2009 | 36-27-1 | 11.6% |
| 2008 | 35-26-3 | 11.7% |
| 2007 | 31-33-0 | -5.4% |
| 2006 | 24-40-0 | -26.4% |
| 2005 | 31-33-0 | -6.0% |
