PERFORMANCEMLB

Will Smith reveals what he knows about Yoshinobu Yamamoto’s viral notebook

An image collage containing 2 images, Image 1 shows Los Angeles Dodgers pitcher Yoshinobu Yamamoto at a press conference, Image 2 shows Los Angeles Dodgers pitcher Yoshinobu Yamamoto throws a baseball in front of an MLB logo display The details of what's inside Yoshinobu Yamamoto's notebook are a mystery. And it appears it'll stay that way. As Yamamoto prepares to take the mound in Game 2 of the NLCS on Monday, his catcher, Will Smith, revealed that he doesn't even know what's inside it. "We're talking constantly, so it's probably the same stuff," Smith said. Another reporter immediately followed up with Smith, asking if he ever writes, "I smoked this guy," after striking them out, to which Smith shrugged it off with a laugh and said, "No." Since Yamamoto joined the Dodgers two years ago, he's regularly been spotted writing in his notebook and taking notes in between innings. According to former professional pitcher Robby Rowland, the reason Yamamoto writes in a notebook instead of utilizing an iPad is that he has drawings of the strike zone. Rowland believes that inside the drawings, he features pitches that are circled with different numbers – which could indicate which pitches batters swung at. He also added that writing down the pitches in the notebook helps more with his memory than utilizing modern technology. The details of what's inside Yoshinobu Yamamoto's notebook are a mystery. AP Photo/Kyla Wolf

October 12, 2026Yahoo Sports
All Stories

The intrigue surrounding Yoshinobu Yamamoto’s notebook reflects his meticulous preparation style. This habit adds a layer of professionalism that bolsters his reputation as a high-IQ pitcher in the MLB market.

The Weekly Movers Digest

Every Monday: the 5 athletes whose cards moved most.

Free · No account needed · Unsubscribe anytime

Players Invest

Daily updates on the performance, brand, business and collectibles driving athlete value across the NFL, NBA and MLB.

© 2026 Players Invest.

Players Invest is an independent sports information and collecting platform. Athlete names, likenesses, statistics, team information, performance data, collectibles, pricing information, and other publicly available information are presented for identification, informational, and editorial purposes only. No affiliation, sponsorship, endorsement, or partnership with any athlete, team, league, or governing organization is implied unless expressly stated.

Market data, listings, estimates, trends, and other information may change over time and may not reflect actual transaction prices or current market conditions. Players Invest does not guarantee the accuracy, completeness, availability, or current market value of information presented on the platform. Users should independently verify information before making any purchase, sale, investment, or other decision.

All trademarks, team names, logos, league names, photographs, and other third-party intellectual property remain the property of their respective owners. Players Invest does not claim ownership of third-party intellectual property displayed on the platform.

We use cookies

Players Invest uses essential cookies to run the site, plus analytics and advertising cookies to understand how visitors use it and to measure our marketing. You can accept or decline the non-essential ones. Privacy Policy