‘Extra special buzz’ will be at Del Mar’s opening day

It’s tough to determine who is going to be busier Wednesday when Del Mar opens shop for its 79th season of thoroughbred racing.
Will it be trainer Doug O’Neill, who entered 12 horses for the 10-race card on opening day, or Del Mar executive Josh Rubinstein, who has the added responsibility of track president this year on top of the position of chief operating officer he already held?
OK, maybe it’s a tossup.
The 48-year-old Rubinstein, who has been an executive at Del Mar since