The defending Korean baseball champions LG Twins have become the first club to win 50 games this season, as they try to claim their second consecutive title. The Twins held off the Kiwoom Heroes 7-5 at Gocheok Sky Dome in Seoul on Thursday to improve to 50-30-0 (wins-losses-ties) for the season. They are in first place by 2 1/2 games over the Samsung Lions. Over the history of the Korea Baseball Organization (KBO), teams that beat others to the 50-game mark have gone on to finish first that season about 69 percent of the time — 25 out of 36. And 21 of those teams have also won the Korean Series titles. The Twins are trying to become the first team to repeat as Korean Series winners since the 2015-2016 Doosan Bears. Austin Dean slugged his league-leading 27th home run in Thursday's win, and closer Son Ju-young pitched a scoreless ninth inning for his 19th save, only one behind the leader, Kim Jae-yoon of the Lions. It was also Son's 14th consecutive save, a new Twins franchise record. Dean and Son have been the two biggest stars for the team that otherwise ranks in the middle of the pack