2 reasons to temper expectations: Their run differential
Let's address the elephant in the room: the Tigers are significantly outperforming their run differential, which currently sits at -48. On average, that should equate to a record of roughly 21-30. That makes a huge difference.
They would be six games back if they were 21-30, instead of one. This again speaks to how good they've been in one-run games.
One way to improve that number is to score more runs. That would obviously help a ton. If they could even be slightly below average with runners in scoring position, their run differential would look a bit better, and they'd probably have a few more wins to go along with it.
Can the Tigers sustain this little run of success and keep this negative run differential? Well, it's not unheard of. The 2021 Seattle Mariners went 90-72 with a run differential of -51. That team also had an insane record in one-run agmes. So, it's possible, but very improbable.