You don't hear as much about the Astros' record in one-run games these days, though it's still a good one.
I was playing around with the numbers this morning, and I don't think there's all that much information that can be gleaned from this, but I figured I'd present the info anyway:
| Diff | G | W | L |
| 1 | 16 | 11 - | 5 |
| 2 | 9 | 2 - | 7 |
| 3 | 10 | 6 - | 4 |
| 4 | 5 | 1 - | 4 |
| 5 | 6 | 3 - | 3 |
| 6 | 1 | 0 - | 1 |
| 7 | 2 | 1 - | 1 |
| 8 | 1 | 1 - | 0 |
| 9 | 3 | 0 - | 3 |
| 10 | 2 | 2 - | 0 |
| 11 | 2 | 0 - | 2 |
| ≤2 | 25 | 13 - | 12 |
| ≤3 | 35 | 19 - | 16 |
| ≤4 | 40 | 20 - | 20 |
| ≤5 | 46 | 23 - | 23 |
| >5 | 11 | 4 - | 7 |