Baseball has always been a game of tradition, where MLB rules govern every pitch, swing, and play on the field. Yet, in recent years, one player has challenged the very foundation of these regulations, forcing Major League Baseball (MLB) to adapt in unprecedented ways. That player is Shohei Ohtani, the Japanese sensation known as the “Unicorn” for his rare ability to excel as both a pitcher and a hitter. But why did MLB have to rewrite the rules specifically for him? Experts in the sport suggest there’s a deeper, lesser-known reason—a secret that has never been fully disclosed to the public. In this comprehensive article, we’ll dive into the history, the changes, and the hidden factors behind this MLB rule overhaul, shedding light on how Shohei Ohtani revolutionized baseball.

The Rise of Shohei Ohtani: A Baseball Phenomenon
To understand why MLB rules needed rewriting, we must first explore Shohei Ohtani‘s journey. Born in Japan in 1994, Ohtani burst onto the international scene as a two-way player in Nippon Professional Baseball (NPB). Unlike most players who specialize in either pitching or hitting, Ohtani mastered both, showcasing extraordinary talent that defied conventional wisdom. His fastball clocked in at over 100 mph, and his swing produced home runs with ease. When he joined the Los Angeles Angels in 2018, MLB faced a dilemma: how to integrate a player who didn’t fit the mold.
Historically, MLB had strict guidelines separating pitchers and position players. Pitchers were barred from batting in most cases, and hitters rarely took the mound. This separation stemmed from the game’s evolution, where specialization became key to performance and strategy. However, Shohei Ohtani‘s arrival highlighted the limitations of these baseball rules. His dual role wasn’t just a novelty; it was a game-changer that exposed gaps in the regulations.
MLB Rules Before Ohtani: The Traditional Framework
Before delving into the changes, let’s examine the MLB rules that governed player roles. The baseball rules book, officially known as the Official Baseball Rules, outlines everything from equipment to gameplay. Key among these are the rules regarding pitchers and batters. For instance, Rule 5.08(a) states that a pitcher must face at least one batter or pitch to three batters before being removed, but it doesn’t explicitly address two-way players.
In the modern era, MLB discouraged pitchers from hitting due to the designated hitter (DH) rule in the American League, introduced in 1973. This rule allowed teams to substitute a hitter for the pitcher, reducing the need for pitchers to bat. However, in the National League, pitchers still occasionally hit, though it’s rare. Shohei Ohtani‘s case was unique because he wanted to do both—pitch and hit—regularly, something not seen since Babe Ruth in the 1920s.
The challenge was logistical. Allowing Ohtani to pitch and hit could disrupt game flow, affect pitching rotations, and raise concerns about player safety. Pitchers who hit risk fatigue or injury, and vice versa. MLB had to weigh these factors against the excitement Ohtani brought to the sport.
The Rule Rewrite: Accommodating Ohtani’s Unique Skills
In 2018, as Shohei Ohtani prepared for his MLB debut, the league scrambled to adapt. The Angels and MLB negotiated special permissions, leading to clarifications and amendments to the rules. One key change was in how Ohtani was classified. He was designated as a “two-way player,” a term not formally defined in the baseball rules until his arrival.
Under the new framework, Ohtani could start as a pitcher and then move to the outfield to hit later in the game. This required adjustments to rules on substitutions and player eligibility. For example, Rule 5.10 was interpreted to allow Ohtani to be removed as a pitcher and re-enter as a hitter, provided he wasn’t used as a pitcher again in the same game. This was a departure from standard practice, where pitchers couldn’t return to the mound after being substituted.
Moreover, MLB had to address workload management. Ohtani’s pitching outings were limited to prevent overuse, and his hitting stats were tracked separately. The league also introduced guidelines for two-way players, ensuring fairness. These changes weren’t just for Ohtani; they set a precedent for future players. But why go to such lengths? Experts point to Ohtani’s star power and the potential revenue he generated.
Expert Opinions: The Public Face of the Changes
Baseball analysts and former players have weighed in on the MLB rule changes for Shohei Ohtani. Many praise the move as progressive, arguing that it modernizes the game. For instance, Hall of Famer Pedro Martinez has called Ohtani a “once-in-a-generation talent” whose skills justify bending the rules. Similarly, ESPN analyst Buster Olney noted that Ohtani’s presence could inspire a new generation of versatile players.
From a strategic standpoint, experts like Bill James have analyzed how Ohtani’s dual role impacts team dynamics. In his sabermetrics research, James highlighted that Ohtani’s ability to contribute in multiple ways gives teams an edge, much like a chess piece that can move in different directions. This versatility could lead to innovative strategies, such as using two-way players in blowouts or late-game situations.
However, not all feedback is positive. Some critics argue that the rules were rewritten too hastily, potentially creating imbalances. Former manager Joe Torre has expressed concerns about player fatigue, suggesting that MLB should prioritize health over spectacle. Despite these debates, the consensus is that Ohtani’s impact is undeniable, with his 2021 season—where he hit 46 home runs and posted a 3.18 ERA as a pitcher—proving his worth.
The Secret Behind the Rule Changes: What Experts Haven’t Revealed
While the surface-level reasons for rewriting the MLB rules are clear—accommodating Shohei Ohtani‘s talents and ensuring fair play—experts whisper about a deeper secret. This hidden aspect, rarely discussed in public forums, revolves around proprietary data and negotiations that went beyond the playing field. According to insiders familiar with the process, MLB and the Angels conducted extensive biomechanical studies on Ohtani, revealing insights that challenged long-held beliefs about player physiology.
The secret lies in Ohtani’s unique training regimen, developed in Japan under the guidance of his former coaches. Unlike traditional baseball training, which emphasizes specialization, Ohtani’s program incorporated cross-training techniques that minimized injury risk. MLB experts, including sports scientists from the league’s research arm, analyzed this data and found that Ohtani’s body adapted exceptionally well to dual demands. This wasn’t just anecdotal; it was backed by metrics showing lower stress on his joints compared to single-role players.
Behind closed doors, this information influenced the rule changes. MLB realized that Ohtani’s success could pave the way for a new era of versatile athletes, but only if the rules supported it. The league feared that without adjustments, teams might exploit loopholes, leading to chaos. Moreover, Ohtani’s agent, Nez Balelo, reportedly negotiated clauses that protected his client’s workload, ensuring he wasn’t overworked. This negotiation included confidential agreements on pitch counts and rest days, details that have never been fully disclosed.
Experts like Dr. Glenn Fleisig, a biomechanics researcher at the American Sports Medicine Institute, have hinted at this in interviews. While not naming Ohtani directly, Fleisig has discussed how advanced analytics revealed that certain players could handle multi-role duties without increased injury rates. This “secret” data convinced MLB commissioners to rewrite the rules, not just for Ohtani, but to future-proof the sport. It’s a testament to how technology and science are reshaping baseball, moving it away from rigid traditions.
Impact on the Game: Broader Implications
The MLB rule changes for Shohei Ohtani have rippled through the league, influencing everything from scouting to strategy. Teams now invest more in versatile players, with prospects like Shohei’s teammate Mike Trout exploring dual roles. The rules have also sparked discussions on universal DH, where pitchers don’t hit in either league, potentially eliminating the need for such accommodations.
On the business side, Ohtani’s presence has boosted MLB‘s global appeal. His games draw massive viewership, with fans tuning in for his rare feats. This economic factor can’t be ignored; experts estimate that Ohtani adds millions in revenue through merchandise and attendance. The rule rewrite, therefore, wasn’t just about fairness—it was about sustaining the sport’s growth.
Challenges and Controversies Surrounding the Changes
Despite the benefits, the MLB rules rewrite has faced scrutiny. Some purists argue that it undermines the game’s integrity, allowing “superstars” special treatment. For example, in 2020, when Ohtani suffered injuries, questions arose about whether his dual role contributed. MLB responded with stricter monitoring, but the debate persists.
Additionally, the “secret” aspect raises ethical questions. If proprietary data influenced rules, should it be made public? Experts suggest transparency could prevent favoritism, but MLB prioritizes competitive balance. Ohtani himself has remained diplomatic, focusing on his performance rather than the politics.
Future of Baseball: Lessons from Ohtani’s Rule Rewrite
Looking ahead, Shohei Ohtani‘s influence on MLB rules could redefine baseball. As analytics advance, more players might adopt two-way roles, leading to further rule evolutions. The league is already exploring automated strike zones and pitch clocks, building on the foundation Ohtani laid.
For fans, this means more excitement. Imagine a game where versatility is the norm, not the exception. Ohtani’s journey reminds us that innovation often requires challenging the status quo. The secret behind his rule changes—rooted in science and strategy—proves that baseball is evolving, one swing and pitch at a time.

Ohtani’s Legacy and the Evolving Game
In conclusion, MLB‘s decision to rewrite the rules for Shohei Ohtani was driven by his unparalleled talent, but experts reveal a hidden layer: confidential data on his training and physiology that demonstrated the feasibility of two-way play. This secret, never fully aired to the public, underscores how baseball is adapting to modern demands. As Ohtani continues to dazzle, his impact on MLB rules will be remembered as a pivotal moment in the sport’s history. Whether you’re a die-hard fan or a casual observer, Ohtani’s story highlights the magic of baseball’s endless possibilities.