The phrase "although there are probably" is correct and usable in written English.
It can be used to introduce a statement that acknowledges uncertainty or speculation about a situation or fact.
Example: "Although there are probably many factors contributing to the issue, we need to focus on the most significant ones first."
Alternatives: "even though there may be" or "despite the likelihood that there are".
This is not just an exercise in myth-bashing, although there are probably too many references to faded sports heroes.
Although there are probably a few in circulation already, I started working on one for New Jerseyans.
We cannot tell Mr. Salazar where to find those people, although there are probably excellent civil servants who might be worth elevating.
There is a case for saying a new prime minister may need a mandate for the withdrawal negotiations – although there are probably very few people in Westminster with the appetite for another election now.
When Minnesota moved him, it was as much about the team, who had finally committed to rebuild, giving Garnett an opportunity to win a championship as it was about an established star trying to push his way out of town (although there are probably elements of truth in both narratives).
Although there are probably more racing series lower down the racing ladder than ever before, these training grounds are not only inadequate, but there are far too many and they are too disparate to form an authoritative route to the pinnacle of world auto racing.
This wasn't mere bloodlust, although there was probably some of that.
It's not just a matter of defending the Obama Administration, although there's probably a bit of that.
Everybody loved Seve, although there were probably a few Americans during Ryder Cup week who had an alternative opinion.
This went down well with Burnham, although there's probably a deeper lesson in this; it's going to take God to save Labour in Norwich North.
Although there were probably many survivals from prehistory, these may be relatively unimportant for understanding later times, because the transformation that established the Egyptian state created a new context for religion.
