Pittsburgh Penguins captain Sidney Crosby is celebrating his 38th birthday on Thursday.Crosby was born on August 7, 1989, which is the eighth month of the year and the seventh day, and in 1987, which is where his No. 87 stems from. Crosby is one of the greatest players of all time, so on his birthday, here are the top five most memorable moments of his career.Five most memorable moments of Sidney Crosby's career#5, Crosby surpasses Wayne Gretzky's recordSidney Crosby has been hyped up as the next great NHL star since he was a little kid, and he has outperformed those expectations.On March 27, Sidney Crosby broke one of Wayne Gretzky's records. He had his 20th straight season averaging at least one point a game, breaking Gretzky's record of 19 straight seasons.#4, Winter Classic winning-goalThe NHL held its first Winter Classic in 2008 as the Pittsburgh Penguins took on the Buffalo Sabres.The game ended up going to a shootout, and to no surprise, Crosby scored the winning goal to end the game in dramatic fashion.Given that this was the first Winter Classic, this shootout winner and the game stick out for many NHL fans, and Crosby had the game-winner in a shootout.#3, Crosby leads Penguins back to Cup in 2016Sidney Crosby won his first Stanley Cup in 2009 with the Penguins, after losing in the 2008 Final.However, after that, Pittsburgh had years of playoff disappointment. But in 2016, Crosby helped lead the Penguins back to the Final and helped them win the Cup.This Cup was special as it was after many people had concerns that Crosby may never play again due to injury and concussion issues. But he ended up coming back and led the Penguins to the Stanley Cup in 2016.#2, Back-to-backAfter leading the Penguins to a Stanley Cup win in 2016, he helped them go back-to-back in 2017.Crosby won the Conn Smythe in 2017 as the playoff MVP, as he took over those playoffs. Crosby finished the playoffs with eight goals and 19 assists for 27 points in 24 games.The Penguins captain had three assists in Pittsburgh's win in Game 5 to take a 3-2 series lead before the Penguins won it in Game 6.#1, Golden GoalThe most memorable moment of Sidney Crosby's career didn't even happen in the NHL but instead happened at the 2010 Olympics.Canada was playing the USA in the gold medal game, and it went to OT after the States tied it late.In overtime, Crosby got a pass from Jarome Iginla and scored the winner to lead Canada to the gold medal. It's one of the most iconic goals in hockey history and Crosby's most memorable moment.