Difficult season off the course, as he suffered the loss of father Earl after a long battle with cancer on May 3. Inside the ropes, World No. 1 dominated with eight victories, including two major titles (The Open Championship and PGA Championship). Entered the 2007 season with a TOUR streak of six consecutive victories. Led the TOUR in scoring average (68.11) but not eligible for seventh Vardon Trophy as he did not play 60 competitive rounds. Won Byron Nelson Award for low scoring average.
On March 11, 2018, he finished one-shot back and tied for second at the Valspar Championship in Florida, his first top-five finish on the PGA Tour since 2013. He then tied for sixth with a score of five under par at the 2018 Open Championship. At the last major of the year Woods finished second at the 2018 PGA Championship, two shots behind the winner Brooks Koepka. It was his best result in a major since 2009 (second at the 2009 PGA Championship) and moved up to 26th in the world rankings. His final round of 64 was his best ever final round in a major.
Surgery: Pulled out of next two PGA TOUR starts, the Genesis Open and The Honda Classic. Released statement: "My doctors have advised me not to play the next two weeks, to continue my treatment and to let my back calm down. This is not what I was hoping for or expecting. I am extremely disappointed to miss the Genesis Open, a tournament that benefits my foundation, and The Honda Classic, my hometown event. I would like to thank Genesis for their support, and I know we will have an outstanding week." In April, announced on his website he had undergone further back surgery. The operation was performed by Dr. Richard Guyer of the Center for Disc Replacement at the Texas Back Institute.