Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Jordan Spieth has hailed the 'most incredible week' of his life after becoming the second youngest Masters winner of all time and the first start-to-finish winner at Augusta in 39 years. Spieth held his nerve in Sunday's final round to keep control of the season's first major championship, matching Tiger Woods' record of an 18-under 270 and finishing four shots clear of the field. Speaking in Butler cabin as he prepared to receive his green jacket, the 21-year-old admitted that despite never giving up the lead, he was still a bag of nerves as he looked to hold off the attentions of two major champions in the form of Phil Mickelson and Justin Rose.Jordan Spieth became the second youngest Masters winner of all timeHis 18-under round was the joint-record and he led from start to finishSpieth hailed the week at Augusta as the most incredible of his life21-year-old admitted that the accolade had not quite sunk in yetJustin Rose praised Spieth, saying he showed comfort playing with a lead 
 Question:'There's many players in the Tiger era who have rued when _ won it by 15 or 12.

Tiger Woods