Hiromi Itoh to Be Posted for MLB Teams After Strong NPB Career

A track record built on innings and strikeouts

Hiromi Itoh’s appeal to MLB clubs rests on a rare combination: six years of sustained NPB production, elite recent control and a deep mix of pitches. The Hokkaido Nippon-Ham Fighters have announced they’ll make the right-hander available through the posting system. Once the paperwork is complete, that process opens a 45-day window for MLB clubs to sign him. The window would pause if no deal is reached before the December 1 lockout, making the timing part of the decision for both Itoh and interested teams.

Since debuting in 2021, the 29-year-old has logged just over 1,000 innings for the Fighters. He has started 149 of his 152 appearances and owns a 2.92 ERA. His 902 strikeouts lead all qualified NPB starters over the past six seasons; Shosei Togo ranks second with 758. That body of work gives clubs more than a brief peak to evaluate. It also says something about durability and role: Itoh has spent nearly all of his time in the rotation, rather than building his record in short relief outings.

His 2025 season was the clearest case for an MLB opportunity. Itoh threw 196 2/3 innings over 27 starts, averaging more than seven innings per outing. He led NPB with 195 strikeouts and posted a career-best 20.8% strikeout-minus-walk rate, second-best in the league. A 43.5% ground-ball rate and six complete games, including a shutout, rounded out the season. He also won the Sawamura Award, Japan’s top pitching honor and an equivalent to the Cy Young Award.

That combination matters because innings, strikeouts and walks answer different questions about a starter. The workload shows he could sustain a major role in Japan, while the strikeout and walk figures suggest he wasn’t relying only on balls finding gloves. The ground-ball rate adds another way to limit damage. None of those measures guarantees the same results against MLB hitters, but together they make his peak season a more persuasive evaluation point than the ERA alone.

His 2026 numbers were less dominant but still strong: a 3.18 ERA and 159 strikeouts in 172 2/3 innings across 26 starts. A 4.7% walk rate stands out as a particular strength. His strikeout rate fell from 24.5% in 2025 to 21.8%, around the middle of the pack among 36 qualified starters. That dip complicates the case without overturning it. The broader question is whether the control and workload hold their value when Itoh faces a different level of competition and a new pitching environment.

Pitch mix over raw velocity

At 5-foot-9 and 180 pounds, Itoh is smaller than the typical MLB starter. His fastball sits in the low 90s, according to Sports Illustrated, with vertical movement and high spin. Yakyu Cosmopolitan has described a broad arsenal built around more than ten grips, including a splitter, sinker, sweeper, curveball and changeup alongside his four-seamer.

A wide repertoire gives a pitcher more ways to change a hitter’s timing and attack different parts of the zone. It can also help explain how a starter with modest velocity keeps recording outs: hitters can’t focus on one fastball speed if the pitcher can vary movement and shape. But a long pitch list is only useful if the offerings are distinct, controlled and effective against better hitters. MLB clubs will need to judge the quality and repeatability of the pitches, not just count them.

That profile points to a finesse-oriented starter who can limit walks and generate ground balls, rather than a power arm. An American League evaluator told ESPN’s Jorge Castillo in March that Itoh could be a “high-end” free agent. How MLB teams value his command and pitch variety against his more modest velocity will shape his market. The numbers here are underwhelming only if velocity is treated as the whole story; command has its own value, though it can be harder to project across leagues.

Fit and contract questions

The Giants are among the clubs reported to have interest. They have limited experienced rotation depth behind Logan Webb and Landen Roupp, which could give Itoh a path to establish himself as a big-league starter. For a team in that position, a starter’s likely role can matter as much as his best-case projection. Itoh’s long history as a starter supports that role, but clubs still have to decide whether his stuff can carry it in MLB.

Tatsuya Imai offers a recent point of comparison, though his MLB transition has been difficult. After signing with Houston for three years and $54 million last offseason, Imai recorded a 4.93 ERA in 76 2/3 innings, with injuries and walks contributing to a move to the bullpen. Itoh brings better NPB control, but less velocity and a more ground-ball-focused approach. That comparison leaves open how reliably his strengths will translate, and it shouldn’t be treated as a direct forecast: the pitchers’ profiles differ, while the adjustment to MLB competition is a shared uncertainty.

Posting costs also shape the value of a deal. Under the current collective bargaining agreement, an MLB club signing Itoh would owe the Fighters a posting fee of 20% of the first $25 million of his major-league contract, 17.5% of the next $25 million and 15% of any amount above $50 million. Those rates could change under the next agreement. For a club, the fee sits alongside the player contract when weighing the total commitment; for Itoh, the key issue remains whether a team sees his command and varied repertoire as enough to anchor a rotation spot.

What his market will test

This is more significant than it looks: Itoh’s case tests how clubs price skills that don’t arrive with premium velocity. His innings and walk rate offer a credible foundation, while the fall in strikeout rate from 2025 to 2026 gives evaluators a reason to look closely at the underlying pitches. Those facts point in different directions, and the contract will reflect how teams resolve that tension.

If you’re working in this space, the central evaluation question is whether Itoh can keep hitters off balance often enough to make his command play at the highest level. (And this is the part most people overlook.) A deep repertoire can help a pitcher adapt, but it also asks teams to be confident that his pitches will remain effective when hitters see them repeatedly. A rotation spot is possible. The price of that confidence is the harder call.

His posting window will give interested clubs a defined period to make that judgment, subject to the stated lockout timing. The evidence makes Itoh a serious candidate for an MLB rotation, particularly for teams that value innings and control. It doesn’t settle how much his velocity and changing strikeout rate should temper that view. That uncertainty is the point.

Photo courtesy of Sam Navarro, Imagn Images