A timeline of Tiger Woods’ injuries after announcing Saturday he had a seventh surgery on his lower back: December 1994 — As a freshman at Stanford, Woods has surgery to remove two benign tumors and scar tissue. December 2002 — Woods has surgery to remove fluid inside and outside his ACL in his left knee, and to remove benign cysts. It is from this surgery that Woods said he learned the ACT was damaged. July 2007 — Ruptures his ACL while running on a golf course after the British Open. He went