Sung-Mun Song

We find ourselves in “add bats, add offense” mode this offseason and Sung-Mun Song might be a sleeper fit worth considering. The 29-year-old South Korean third baseman was recently posted for MLB free agency, giving clubs through Dec. 21 to strike a deal

He’s emerged as one of the KBO’s most dangerous left-handed hitters and isn’t just posting stats. In 2025, he slashed .315 with a career-best 26 home runs and 90+ RBIs. That kind of production, left-handed power, run production is something we can use.

Evaluating the infield mix and the need for a potent right or left-handed bat at the hot corner or perhaps first base Song offers flexibility. Though primarily a third baseman in Korea, he has experience at first and second as well. Having a lefty-power bat slot into the 3B/1B mix gives us more versatility and depth.


At 29, Song isn’t a long-term rookie project: he’s a mature hitter with a full body of work. He blossomed after returning from an earlier slow stretch, showing resilience and growth. For a club like us, one that sometimes leans heavily on upside but lacks consistency, adding a hitter like Song could balance the youth with experience and give the roster a steadier offensive anchor.

While we have focused a lot this offseason on pitching upgrades, the hitting lineup hasn’t always been reliable. A left-handed slugger who can bring both average and pop to the middle of the order could lift run production and make the lineup more dangerous. Defensively, he might not be a Gold Glove-level third baseman out of the gate but if he can provide acceptable defense, the offensive upside alone might make him worthwhile.

Signing Song isn’t a guarantee of stardom. The jump from KBO to MLB isn’t trivial. There’s always the question of whether KBO stats translate. But if he adjusts, the Angels might have landed a bargain: a proven hitter in his prime with power, average, and positional flexibility.

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FungoAle
Legend
1 day ago

With these players from Korea, it will take a year just to get used to MLB pitching. Even then, this guys swing is susceptible to strikeouts. I think he’ll get owned by MLB pitching.

So many teams are interested him, maybe the better route is Ha-Seong Kim. Push Neto over to 3rd. He’s got a good enough arm and can make the play on a ball hit right at him..

grichmanpoorman
Trusted Member
1 day ago

If veteran Japanese players tend to lose 30-40 points of BA when they transition to the MLB, the delta between the KBL and MLB is generally 50-70 points. That was/is the loss range for Ha-Seong Kim and Jung Hoo Lee, and also what Hee-Seop Choi gained when he went back to Korea mid-career.
So Song is probably a best-case .265 hitter? If that came with 20 HRs and a .330-ish OBP and a dependable 3B glove, would be a bargain at $15M/year.

Biggiswrth
Trusted Member
1 day ago

With multiple teams interested, how do we find the right # to post to the KBO team to offer this guy a contract? Isn’t the posting $ hidden from other teams?

I do like the opportunity here and I wonder how much money we will be able to use once part of Rendon contract is now available earlier than expected!

CAoldskoll
Trusted Member
1 day ago

Lower risk with his asking price. Not so sure about how well KBO stats will translate into MLB. Look at Jung Hoo Lee, the Korean Ichiro with 340 KBO avg. Translated to a 260 hitter with little pop that the Giants dearly overpaid for

JackFrost
Legend
1 day ago
Reply to  CAoldskoll

I think we should trade for Song Sung Blue from the Red Sox system.

gitchogritchoffmypettis
Legend
Reply to  CAoldskoll

I think it is likely Song becomes…. Rengifo but LF, with a little more pop, and less stupid with one less abandoned pregnant wife. I’d pay a little money for that and be happy with it. If he hit .260 with an OK OBP and a dozen home runs at 3B I’d be stoked. If he brings along some super hot Korean chicks who do crazy flips before they throw out the first pitch even better.

Turk's Teeth
Editor
Super Member
1 day ago

Here’s a rather comprehensive scouting report from Longenhagen over at Fangraphs:

Pre-2022, Song didn’t have a full season of at-bats to his name. Pre-2024, he hadn’t shown anything beyond threadbare power. Now noticeably stronger and loading into his back hip with reckless abandon, the 29-year-old is coming off back-to-back .900-plus OPS seasons in the KBO and launched a career-high 26 home runs in 2025 to prop up a credible case that his bat can profile at third base in MLB.

Before delving into that, Song has a surfeit of supplementary skills that lessen the pressure on his offensive production. While he defaults to sitting back on choppers and leaning on his plus throwing arm at third base, Song is graceful and fluid on the run, accurate at different arm angles or when throwing off one leg, and is armed with a reliable play clock. An above-average runner, Song’s basethieving has broken out over the last two years alongside his power, going 46 for 48 on steals since 2024.

Visually, Song pulls off to the first base side pretty aggressively at the finish of his swing, as his mid-career power surge finds him cranking out a big leg kick, counter-rotating his torso and then just letting it rip as hard as his body will allow. He’s seeing the plus pull power manifest that such a swing trait is trying to conjure, and has only seen his contact rate dip into the low 80s as a result. And he can flick elevated outer-half mistakes over the fence to the opposite field to boot.

He’s been platoon neutral up to this point and has remained productive against the limited exposure to premium velocity the KBO has offered him. But his chase rate spiked to around 30% last year per Synergy, even in an environment where the average heater Song is seeing clocks in around 91 mph, and his aggressive lefty scoop of a swing is accordingly vulnerable to velocity up and away, creating substantially more hit tool risk than a .327 batting average over the last two years might indicate. With his defense, baserunning, and devotion to accessing his plus raw pop, Song seems better insulated from busting than some more accomplished and toolsier Pacific Rim hitters coming stateside, even if a .230 batting average feels far more likely than .330 reprise.

Jeff Joiner
Editor
Legend
1 day ago
Reply to  Turk's Teeth

So if this power swing doesn’t work stateside he could revert to being a singles machine with good defense and base running.

gitchogritchoffmypettis
Legend
Reply to  Turk's Teeth

That swing does scream “long term oblique injury” or back injury like crazy. Not saying I don’t want him, I actually prefer him to Murakami. But there is the off chance he could become a total piece of shit human being who prefers being injured to playing baseball.

Fansince1971
Legend
2 days ago

He could likely be signed inexpensively….in other words for a song.

Last edited 2 days ago by Fansince1971
Jeff Joiner
Editor
Legend
2 days ago

KBO is probably AA baseball.

Song hasn’t seen the consistent velo of MLB but he’s seen good breaking stuff and pitchers with good control.

We need to take some chances. I’d take this one.

Eric_in_Portland
Legend
2 days ago

Just saying “third base” is enough to make me very interested. I don’t know much about the KBL. Need to do some research!

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