Nothing affects how a Korean male baseball player plans his career more than military service. South Korea requires men to serve in the military, and for a player that can mean leaving the field for nearly two seasons in his mid-twenties, right before his skills peak. Both players and clubs start working out when and how to handle it from early in a career.
The most popular solution is the Armed Forces Athletic Corps, better known as Sangmu. The Sangmu baseball team plays in the Futures League, the minor league of the Korea Baseball Organization (KBO), so players can keep playing real games while they serve. Coming out of service with your baseball sense intact is a world away from coming back after putting baseball down completely. That is why competition to get in is fierce every year, and not everyone makes it. Sangmu looks at an applicant's skill and track record. Players who have already proven themselves to some degree in the pros have the edge, and those who are turned down must wait for the next chance or enlist for regular active duty.
A player who wins Asian Games gold or an Olympic medal is placed in the arts and sports personnel program, a form of alternative service, which effectively settles his military duty. He only goes through basic military training and can keep playing, so this is the best scenario for a player. But this path is not something a player can choose. First he has to be good enough to make the national team, and then the team has to deliver at the tournament. For a player whose national team call-up comes while his service is still unresolved, one tournament can decide a major turn in his career.
If a player misses out on Sangmu and has no exemption, what remains is regular active duty. He has to put baseball down for about 18 months, which makes it the scenario players fear most. After returning, it often takes nearly a full season just to get his body back into shape, and by then another player has his spot on the team. That is why clubs manage the timing of their prospects' enlistment as a strategy. A common approach is to have a young player serve early, before he has locked down a place on the top team.
With military service, timing matters as much as the method. Serving early lets a player use his late-twenties prime in full. Putting it off delays free agency eligibility and narrows the door to playing overseas. Players with unresolved military service also face restrictions on moving to foreign leagues, so the bigger a player dreams, the sooner he tries to get it done. On the other hand, a player with a shot at the national team may gamble by putting it off in hopes of an exemption. Either way, there is no single right answer. It is closer to a game of odds shaped by each player's skill and situation.
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