World number one golfer Tiger Woods has become a dad for the second time after wife Elin gave birth to a boy, Charlie Axel, on Sunday. The couple already have a daughter Sam Alexis, who was born in June 2007, and proud dad Tiger announced news of the latest family addition on his official Web site on Monday. “Elin and I are thrilled to announce the birth of our son, Charlie Axel Woods,” said Woods who has been sidelined since knee surgery following his 14th major triumph at the U.S.