Tiger Woods announced Saturday he will be working with a new instructor - Chris Como, 37, of Gleneagles Country Club in Plano, Texas.
Here's a look back at Tiger's previous instructors and the key stats heading into the 2015 season.
Butch Harmon: 1996 - August 2002
PGA Tour winning percentage: 26.8%
Hank Haney: March 2004 - May 2010
PGA Tour winning percentage: 33.3%
Sean Foley: August 2010 - August 2014
PGA Tour winning percentage: 14.5%
Woods turns 39 on December 30, and he'll have his work cut out for him with his new instructor if he wants to catch Jack Nicklaus's record of 18 majors.
Nicklaus, Ben Hogan and Sam Snead are the only players to win three major after turning 39.
Most Majors Won After Turning 39 Since First Masters Held in 1934
Jack Nicklaus: 3
Ben Hogan: 3
Sam Snead: 3
5 players with 2
Last 4 Majors Won by Jack Nicklaus
1978 Open Championship: 38 years old
1980 U.S. Open: 40
1980 PGA Championship: 40
1986 Masters: 46
Most Majors Won Before Turning 39 Since First Masters Held in 1934
Jack Nicklaus: 15
Tiger Woods: 14
Tom Watson: 8
Gary Player: 8
Arnold Palmer: 7
(Stats by Golf Channel Research Team)