Billy Butler rescued the Royals from a possible dreadful loss Wednesday night by leading off the ninth inning with a walk-off home run for an 8-7 victory over the Seattle Mariners at Kauffman Stadium.

No, he wasn't sure it was gone.

"Never at night here," Butler said. "As the night goes on, it gets tougher and tougher to hit it out of here. The air gets thicker. Earlier in the game, I feel it would have gone a lot farther.

"I just knew I at least had a double, would have got to second and had a pinch runner. I knew it was a minimum of that."