Paul Casey leads Memorial after second round of 66 . Overnight leader Rory McIlroy suffers badly during second round . John Watson ends day in second position . `` Hopefully that 's the bad run out of the way Top - ranked Adam Scott still in contention .
Paul Casey leads Memorial after second round of 66 . Overnight leader Rory McIlroy suffers badly during second round . John Watson ends day in second position . Top - ranked Adam Scott still in contention .