The betting market is pretty good at creating accurate totals to split both sides 50/50. But in most sports, games do go under slightly more often. It's not enough to beat the vig and be blindly profitable, though.
Overs hit 47.8% of the time and unders occurred at a 49.3% rate. (Pushes account for the remaining percentage.) Let's compare that to the games played in 2024, 2024, and 2024 when overs hit 40.3% of the time and unders a staggering 58.9%.
