March Madness Over/Under Betting History
BETMGMSince 2018, the over is 119-144 (.452) in tournament games. In three of those four 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 |
| 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% |
