David Ortiz turned 40 years old on Wednesday and officially announced his post-2016 retirement in a video for Derek Jeter's website, The Players' Tribune. He hit his 500th home run on Sept. 12, finishing the season with 503 career round-trippers. Perhaps most significantly, at least in terms of how he will be remembered, Ortiz won three World Series with the Red Sox, a team that had gone 86 years without a championship before his arrival in Boston but has won three times in his 13 years with the team. We present these 34 rare SI photos of No. 34, one of the greatest designated hitters of all time, Big Papi.