Sung-Bum Na

The Kia Tigers of the Korea Baseball Organization announced a six-year contract with free agent outfielder Sung-bum Na. The deal is worth $12.6MM, a figure that’s tied for the loftiest deal in KBO history (h/t to Jeeho Yoo of Yonhap).

Na has appeared on major league radars in each of the past two offseasons. Na’s former team, the NC Dinos, made him available to big league clubs via the posting system last winter. His 30-day window to sign with an MLB team went without an agreement, though, and Na returned to the Dinos this past season.

This winter, Na qualified for domestic free agency in South Korea but remained one year away from unrestricted international free agency. Major League Baseball tendered a status check on Na last month, indicating that at least one major league team expressed interest in the left-handed hitter.

Obviously, Na’s deal with the Tigers forecloses the possibility of his making the jump to the big leagues this year. In all likelihood, it closes the books on any potential MLB future for Na, who turned 32 years old in October. The six-year term will keep him with the Tigers through the end of his age-37 campaign. It seems unlikely he’d make the move stateside at that point of his career.

Na has spent nine seasons playing in Korea’s top league. He’d spent his entire career to date with the Dinos, combining for an impressive .312/.378/.538 line. This past season, Na hit .281/.337/.506 with 32 home runs across 565 plate appearances. That’s not quite his peak form, although that output still checked in 24 points above the KBO league average by measure of wRC+.

Major League Baseball has tendered a status check on outfielder Sung-Bum Na of the Korea Baseball Organization’s NC Dinos, reports Jee-ho Yoo of South Korea’s Yonhap News Agency. The agreement between MLB and the KBO stipulates that if a team has interest in a KBO player that is eligible for posting, that MLB team must formally check the status of the player through official league channels. As Yoo points out, the status check indicates that at least one MLB team has expressed interest in signing Na this winter, but MLB must not reveal the team, or teams, in question. In the case of Na, who just turned 32 last month, Yoo clarifies that he is eligible for domestic free agency but still a year away from total international free agency. In other words, if Na wants to come to MLB this winter, he is still subject to the posting system.

This isn’t the first time that the lefty slugger has been considered by MLB teams. He was posted by the Dinos in December of last year, giving him 30 days to negotiate with all MLB clubs. At the time, he was coming off an injury-plagued 2019 and then a strong bounceback campaign in 2020. A knee injury and subsequent surgery limited Na to just 23 games in the 2019 season. In 2020, he returned and got into 130 games but primarily as a designated hitter, with 50 games as a right fielder, 45 of those being starts. However, the knee injury certainly didn’t stop him from contributing with the bat that year. His 2020 slash line was an excellent .324/.390/.596 with 34 home runs. On the other hand, he stole only 3 bases, after usually being in the 10-20 range prior to the knee issues. He also saw his strikeout rate jump to 25.3%, after carrying a career 21.3% rate before 2020. The 30-day posting period ended without Na signing a contract and he returned to the Dinos.

In 2021, Na’s output with the bat dropped slightly, as he hit .281/.337/.506, with 32 home runs, 24.9% strikeout rate, along with just a single stolen base. But on a positive note, he played 143 games, including 129 starts in right field, which perhaps signals that he has moved beyond the knee issues that were hampering him in 2020, at least to some degree. Based on that season, it’s unclear whether that would increase Na’s chances of finding a deal to his liking this offseason. From an offensive standpoint, his platform season is a notch below what he had when negotiating with MLB clubs a year ago. But he’s also now put together two consecutive healthy seasons, including a return to near full-time duties in the field for 2021, potentially allaying concerns about his knee.

Na would also be competing with a fairly healthy class of corner outfielders on the market this winter, and would be looking for a deal during a time when a lot of teams may be hesitant to throw money around until the new CBA is hammered out. Then again, teams were also hesitant to spend a year ago, after a season of heavy losses because of the pandemic.

If Na is able to secure a deal, the rules of the agreement between MLB and KBO stipulate that a posting fee be paid to his former team that will be tied directly to the size of the contract he signs. It is a separate sum that is paid out to the KBO club as opposed to an amount that is subtracted from the player’s eventual contract. A signing team would pay 20 percent of the contract’s first $25MM, plus 17.5 percent of the next $25MM and an additional 15 percent on any dollars guaranteed beyond $50MM.

With regard to contractual options and incentives, those clauses are also subject to subsequent fees. A Major League team would only be immediately responsible for posting/release fees on the guaranteed portion of the contract. But if a player’s new team in the Majors exercised a club option down the road, for instance, that team would owe a supplemental fee to the player’s former KBO club once the option is picked up.

The NC Dinos have officially posted slugger Sung-Bum Na, MLB Network’s Jon Heyman tweets. Thus begins a thirty-day period during which big league teams can attempt to work out an agreement with the Korean star.

Na’s posting was already well-publicized, but it took a week for everything to be finalized. He is represented by super-agent Scott Boras. Any club that inks Na will also owe a transfer fee to the Dinos.

It remains to be seen just how interested MLB clubs will be in obtaining Na’s services. There’s little doubt he’s a monster in Korea’s top league, but questions remain whether he can thrive at the plate against the best pitching in the world.

Na, 31, would surely have been a more appealing target had he not suffered a catastrophic knee injury in 2019. That not only prevented him from attempting the transition one season sooner, but left him with a somewhat less compelling defensive and baserunning skill profile.