This one is very hard to call. Reed has the three shot advantage and has been playing stellar golf but, as they say, the Masters really starts at the back nine on Sunday and Reed has never been in this position before in a major. McIlroy has the experience and has looked in the right frame of mind all week, making several big par putts to keep him in contention. Fowler and Rahm aren't too far back. It promises to be a great final round.
This is the first time since winning the other three majors that McIlroy looks like he can finally get that career slam. I hope he pulls it off. A final round like at the Arnold Palmer Invitational would do nicely!