Another interesting aspect of Culberson's cycle was that it was a natural cycle. He got each hit in the following order: single, double, triple, and home run. That is more unusual than you may think; there have only been 14 natural cycles in MLB history, the most recent being Gary Matthews Jr. in 2002. There are several factors that go into whether or not a player will have a natural cycle. First of all, there must be at least five balls put in play for the cycle to happen. Also, there can't be any out during the at-bat. If these conditions are met, then the player will usually get three hits before going down on one knee. However, this doesn't always happen; sometimes a player will hit one ball hard but not get enough calls to reach base safely. In this case, he will often be forced out by another member of the team while running toward first base (or wherever he thinks the ball went). Overall, there have been 51 home run cycles in MLB history. The most recent happened in 2012 when David Ortiz hit one for every major league team. Before that, it had been three years since the last time something like this happened.