We know that they told the truth about a lot of stuff. I suppose it's possible
that they suddenly all together stopped telling the truth about the same things for some reason, even though doing so threatened their immunity agreements, but that seems extremely unlikely.
I can only think of one instance where the owner contradicted himself in an interview, but it wasn't about a substantive fact, it was speculation as to whether or not stealing the signs impacted the World Series (and even then, it's easy to see from the context how it could have happened). What material factual elements are there the owner and players have contradicted themselves?