That's the part with Borlase that doesn't make sense to me. Why would we give him 2 years (again assuming this info is correct) to be our 4th/5th best KPD optionMy guess would be if we're keeping Borlase it's on minimum chips as a solid defender to keep in the SANFL to help there, who can also fill in if we get super desperate for our main side.
I don't necessarily see the need to give him 2 years though as I can't imagine there's a huge market for him and he may not want to uproot his life for the same opportunity we're presenting him.