There is no such thing as multi-region Blu-Ray players, unless you go to the trouble of making a cracked copy, which is expensive (Blu-Ray writer, blank disc, etc). You can only play discs for your region or those that aren't locked. I do have several of those, because AxelMusic were doing some outrageous offers, but luckily they also go out of their way to check if the disc will play outside the States.
Ironically, on Stone, they don't know, but consider it very likely it will be locked. This one seems to be as well.