No MLB won’t let them stay in Sacramento as it is not a MLB quality stadium. The A’s are going to Vegas. Manfred has already stated they are 100% going to Vegas. The only other option is to return to Oakland even though MLB has marked that stadium as not up to MLB standards. MLB had pushed for the A’s to leave Oakland because of an inadequate stadium, why would they allow them to stay in Sacramento with a AAA stadium? Either Sacramento would need to fund a new stadium or the A’s would have to build a stadium in Sacramento. I don’t see either happening. If the A’s are not able to move to Vegas they will be moved to another city or there will be removed from MLB as a franchise.