I'd have to say no on that one.
There are some players who are undoubtedly very close (Bollox, Avatar, et. al.), however the 100 double eagles you need for Diamond might be the tricky part....especially considering the entire WGT community has a total of about 60 or so?
The 500 ft total putt length for 18 will also be really tough to get, but that one I won't rule out....it's at least feasible. Bloody tough...but feasible.