What Does ATS Mean in Betting?

Once you start reading matchup previews, you will see it everywhere: a team's record listed twice, like 9-3 straight up but 6-6 ATS. Same team, same season, two different stories. Here is what the second number is telling you.
Those two records can belong to the same team in the same season. The first says the team wins a lot. The second says bettors who backed them lost money doing it.
ATS vs. straight up
Every spread has a margin attached. The favorite covers by winning by more than the number, and the underdog covers by losing by less or winning outright. An ATS record is a running tally of which side of that math a team landed on. A straight-up record, written SU, only cares who won.
| Game | Line | Final | SU | ATS |
|---|---|---|---|---|
| Week 1 | -6.5 | W 20-17 | W | L |
| Week 2 | -3 | W 27-13 | W | W |
| Week 3 | -9.5 | W 24-21 | W | L |
| Week 4 | +2.5 | L 17-19 | L | W |
| Week 5 | -7 | W 31-24 | W | P |
| Week 6 | -4 | W 23-20 | W | L |
| Total | 5-1 | 2-3-1 |
Why ATS matters more than most people think
A straight-up record tells you almost nothing about whether betting a team has been profitable. Spreads are set to make every game close to a coin flip on paper. A team that keeps winning by 2 or 3 is doing exactly what a good favorite should on the field, and costing anyone who laid -7 with them all season.
That is why ATS trends come up so often in handicapping. "The Ravens are 3-7 ATS as a road favorite" tells a bettor far more than "the Ravens are 8-2."
ATS questions
What does ATS mean in betting?
How is an ATS record calculated?
What is the difference between ATS and SU?
Does a good ATS record mean a team is good?
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