[Jul 18, 2026 (Sat)] NPB Japanese Baseball Analysis Swallows vs BayStars Preview - BeaverStats

This is an NPB analysis post written by AI.

Quick preview of Swallows vs BayStars (Jul 18, 2026 (Sat)).

*Lineups aren't confirmed yet! They're usually locked in about 30 minutes before first pitch, so check the link below for the latest before betting.

The screenshots below are captured straight from the site's data.

You can see the full, more detailed data on the game list.

This post was analyzed/written by AI based on data from beaverstats.com. Treat it as a reference only - always verify the numbers yourself before acting on them.

Swallows vs BayStars (Jul 18, 6:00 PM, Yokohama Stadium)

Starters: Swallows Kengo Matsumoto / BayStars Osuke Fukazawa

By the standings, the BayStars are 4th (35-46-3, .432) on a 1-game winning streak, while the Swallows are 3rd (41-42-1, .494) having dropped their last 3. Overall record slightly favors the Swallows.

The season series tells a very different story, though. The Swallows lead the overall season series 8-6, but the BayStars have swept all 5 of the most recent head-to-head meetings (12-4, 6-4, 12-1, 7-2, 1-0). Regardless of the overall standings or season series score, the BayStars have completely dominated this particular matchup lately.

The starting pitching matchup is interesting too. Fukazawa has made only 4 starts all season (18 innings), a very thin sample, but his velocity has climbed noticeably from the 140s up to 145 km/h recently. Matsumoto has been steady in the 146-147 km/h range, though he dipped to 143 in his June 20 start before bouncing back.

Season ERA favors Matsumoto (2.85, excellent) over Fukazawa (4.50) - though again, Fukazawa's number comes from just 4 starts, so it's too small a sample to lean on heavily. Looking at recent form, Matsumoto's last-5 ERA has actually jumped to 4.73, worse than his season number - and that stretch includes a rough July 4 start against today's opponent, the BayStars, where he gave up 5 earned in 5 innings (9.00 ERA). For Fukazawa, his season ERA and recent-form ERA are the same number since his whole season is those same 4 starts, so "recent form" isn't a separate signal for him yet.

On history against today's specific opponent: Fukazawa has faced the Swallows just once this year (July 5, 5 IP, 0 ER, 0.00 ERA) - which happens to be his best start of the season. Matsumoto has faced the BayStars three times this year with ERAs of 9.00, 4.50, and 0.00 - up and down, and his most recent look at them was also his worst.

Neither lineup is confirmed yet, so the batter-matchup notes below use each team's lineup from their last game (July 17) as a stand-in. Against Matsumoto, the BayStars' Keita Sano (4-for-8) and Atsushi Katsumata (3-for-7) have solid track records. Against Fukazawa, most Swallows hitters have come up empty in tiny samples (Yudai Koga 0-for-1, Domingo Santana 0-for-1, Yukihiro Iwata 0-for-2) - not much signal there given the sample size.

The bullpen gap is stark. Over the last 10 games, the BayStars' relief ERA (2.78) is far better than the Swallows' (6.75). Recent workload is similar (BayStars 10.3 innings vs Swallows 10.0 innings over the last 3 games).

At the plate, the BayStars have held steady - .272 season average to .279 over the last 5 games - while the Swallows have cooled further, from .244 down to .221. The BayStars' Keita Sano (.400) and Asahi Miyashita (.375) are hot, while for the Swallows, Hideki Nagaoka (.421) is the lone bright spot on an otherwise cold roster. On the flip side, the BayStars' Shuto Ogata (.167) and the Swallows' Ryusei Takeoka and Keiji Takahashi (both .000) have gone quiet.

Putting it together: the overall record and season series lean slightly toward the Swallows, but every recent-form indicator - the 5-game head-to-head sweep, the opposing starter's rough recent outing against them specifically, and a lopsided bullpen edge - points toward the BayStars. This is a case where the surface-level standings and the actual recent trend pull in noticeably different directions.