* Australian cards 70 in intermittent rain * On track for wire-to-wire win * Stenson in three-way tie for second (Adds detail, quotes) March 19 (Reuters) - Jason Day, seeking his eighth PGA Tour victory, rebounded from a stumbling start to preserve a two-shot lead after Saturday's rain-soaked third round of the Arnold Palmer Invitational in Orlando, Florida. Two ahead overnight, the world number three bogeyed the par-three second after finding a bunker off the tee but birdied three of the next six holes on the way to a two-under 70 at a soggy Bay Hill. "I feel like I stayed patient to grind out a two-under par," Day told reporters after playing through several rain showers to maintain the lead he has held from the opening round. More...