Nationals Sign Shinnosuke Ogasawara

The Nationals announced the signing of left-hander Shinnosuke Ogasawara to a two-year deal on Friday. The WME Baseball client is reportedly guaranteed $3.5MM. He’ll make $1.5MM this year and $2MM in 2026. The Nationals will pay a $700K posting fee to his former team, the Chunichi Dragons of Japan’s Nippon Professional Baseball. It’s a $4.2MM investment altogether. Fellow lefty Joe La Sorsa was designated for assignment in a corresponding move.

Ogasawara, 27, pitched in part of nine seasons for Dragons. He threw 951 1/3 innings, allowing 3.62 earned runs per nine. He struck out 18.9% of batters faced while giving out walks at a 7.7% clip.

Despite fairly decent run prevention, there are also some concerning elements in Ogasawara’s profile. His strikeout rate in Japan is a bit below what is expected of hurlers in North America these days, as the league average has been in the 22-23% range in recent seasons. He’s also a bit undersized, listed at 5’11” and 183 pounds. That size isn’t necessarily a disqualification, as it actually makes him larger than Shota Imanaga, who is 5’10” and 175. Imanaga proved himself capable of handling MLB hitters in 2024 but he also had a 25% strikeout rate in his NPB career before crossing, notably higher than Ogasawara.

It’s also a metric that has wavered for Ogasawara. He got his rate of punchouts as high as 24% in 2022, but then it dropped to 20.1% the year after and then fell way down to 13.6% in the most recent season. That big drop in strikeouts did coincide with a tiny walk rate of 3.7% and he still managed to post a 3.12 ERA, but it does lead to questions as to how his stuff will play in his new environment. He throws a fastball in the 91-93 mile-per-hour range, as well as featuring a curveball and a changeup.

Despite the question marks, it’s a sensible gamble for the Nats to take. The club has been rebuilding for a while, having recently wrapped up their fifth straight losing season. There was some speculation that they might come into this offseason looking to take a step forward, perhaps making a bold strike or two, but that hasn’t really come to pass.

They did make some moves, but mostly avoided committing themselves to anything beyond 2026. They signed Josh Bell, Michael Soroka, Amed Rosario and Jorge López to one-year deals. They brought back Trevor Williams on a two-year pact. Nathaniel Lowe, who has two seasons of club control remaining, was acquired from the Rangers.

Bringing in Ogasawara on a two-year pact aligns with those other moves. The club has seemingly taken the path of making some decent additions while also waiting to see how young players like Dylan Crews, James Wood and Brady House develop. Once they get more clarity on those players and others, they can decide about more assertive moves in the future.

The same is largely true of their rotation. Young and controllable pitchers like MacKenzie Gore, Jake Irvin, Mitchell Parker, DJ Herz and Cade Cavalli have shown some progress to varying degrees but there are still some question marks there. Irvin and Parker have posted decent run prevention numbers but with subpar strikeout rates. Herz had a nice MLB debut in 2024 but had massive walk problems in the minors. Cavalli missed the past two seasons due to Tommy John surgery.

The Nats would probably like a bit more time to continue evaluating those guys to see who among them can emerge as real rotation building blocks. They could have rolled into the season with a rotation of Gore, Irvin, Parker, Herz and Cavalli but clearly wanted to add some more options and improve the overall depth. As mentioned, they signed Soroka and Williams, with Ogasawara now added into the mix as well.

Those three and Gore should have four rotation spots accounted for, at least to start the season. Both Soroka and Williams have some relief experience and could get pushed to the bullpen if they struggle or one of the younger guys pushes them out. Each of Irvin, Parker, Herz and Cavalli have options and could get pushed to Triple-A. The Nats could perhaps consider a six-man rotation, though doing so would limit them to a seven-man bullpen. Josiah Gray could get back in the mix late in 2025 but is currently rehabbing from a Tommy John and internal brace surgery which was performed in July.

Perhaps the bolstered roster will push the Nats into a greater chance of contention, but they are also looking up at three really strong teams in the division. Atlanta and Philadelphia have been powerhouses for years while the Mets just made the playoffs and have been very aggressive, including adding Juan Soto. If the Nats find themselves outside the playoff mix come July, any of the players they’ve added could become trade candidates, on account of their short windows of club control.

The Dragons posted Ogasawara on December 10, which led to a 45-day posting window that ended today. If he had not signed, he would have returned to the Dragons but he’ll be coming to Washington instead. Unlike Roki Sasaki, Ogasawara is not subject to the international bonus pool system. That’s because he is over 25 years old and has at least six professional seasons on his track record. MLBTR predicted him for a two-year, $12MM deal at the start of the offseason.

The Nats owe the Dragons a posting fee, with the size of that fee dependent on the size of the contract. That fee will be equal to 20% of the contract’s first $25MM, 17.5% of the next $25MM and 15% of any dollars thereafter. Since Ogasawara signed for less than $25MM, it’s simply 20% of the guarantee.

La Sorsa, 27 in April, has been a fringe member of the Washington roster for a while. He was claimed off waivers from the Rays in June of 2023 but was outrighted off the roster in December of that year. He got his roster spot back in August of 2024 but has now been bumped off again.

Between the Rays and the Nats, he has 50 1/3 innings in the big leagues with a 4.47 ERA, 19.2% strikeout rate and 6.4% walk rate. He had a strong showing in the minors in 2022, throwing 73 1/3 innings with a 2.33 ERA, 31.4% strikeout rate and 3.6% walk rate. However, he’s been a bit less impressive over the past two seasons, having thrown 92 2/3 innings with a 2.82 ERA, 18% strikeout rate and 6.2% walk rate. A .268 batting average on balls in play and 82.3% strand rate helped him out in that time, which is why his 4.62 FIP was almost two runs higher than his ERA.

He’ll now head to DFA limbo for a week at most. The Nats could explore trades for the next five days but would have to put him on waivers after that, since the waiver process takes 48 hours. If he were to pass through unclaimed, he would have the right to elect free agency on account of his previous outright.

The Associated Press reported the terms of Ogasawara’s deal.