What Just Happened? MLB’s Unanimous Vote on Rule Changes

In a historic vote on January 12, 2023, MLB owners and the MLB Players Association (MLBPA) unanimously agreed to implement a series of rule changes designed to modernize the game. The changes, first proposed in late 2022, were negotiated over months and approved without dissent, marking a rare moment of consensus in baseball’s often contentious labor landscape.

According to MLB’s official announcement, the rule changes will take effect during the 2023 season. Key components include:

• Elimination of the defensive shift: Teams will no longer be allowed to position fielders in unorthodox ways to exploit hitters’ weaknesses.
• Expanded strike zone: Umpires will be required to call pitches in the zone more strictly, reducing the number of balls and strikes.
• Pitch clock: A 15-second timer will be introduced between pitches, with penalties for teams exceeding the limit.
• New defensive positioning rules: Fielders must stand within a certain distance of their assigned positions, further limiting defensive flexibility.

Why These Changes Matter: The Shift Debate and Offense Crisis

The push for these rules stems from two primary concerns: the decline in offensive production and the dominance of defensive strategies like the shift. Over the past decade, baseball has seen a dramatic drop in runs scored, with the league average falling from 4.5 runs per game in 2015 to just 3.8 in 2022, according to Baseball-Reference.

The defensive shift, in particular, has been a lightning rod for criticism. Teams like the Houston Astros and Atlanta Braves have used extreme defensive alignments—sometimes with as many as six infielders bunched on one side—to neutralize pull-heavy hitters. In 2022, shifts were used on 70% of all ground balls, up from just 20% in 2011, according to FanGraphs. The result? A game where batters struggle to find gaps, and pitchers dominate with lower strikeout rates.

“The shift has warped the way the game is played,” said Rob Arthur of The Athletic. “It’s not just about strategy—it’s about fairness. Hitters deserve a chance to hit the ball where it’s pitched.”

Rule-by-Rule Breakdown: What Changes and When

The new rules will be phased in gradually, with some taking effect immediately in spring training and others rolling out during the regular season. Here’s a detailed look at each change:

1. The End of the Defensive Shift

Starting in 2023, teams will no longer be allowed to position infielders in unorthodox ways. Specifically:

• No more than two infielders can be on the same side of second base or shortstop.
• Fielders must be positioned within a “reasonable” distance of their assigned positions (e.g., no bunched-up infielders).
• Umpires will have discretion to enforce these rules, with penalties for violations (e.g., an automatic out or a warning).

2. Expanded Strike Zone

The strike zone will be redefined to include pitches in the zone more strictly. According to MLB’s official strike zone guidelines, umpires will be instructed to:

• Call pitches in the zone as strikes, even if they are slightly off the plate.
• Reduce the number of balls called on pitches outside the zone.
• Use technology (like Statcast) to assist in strike zone calls during spring training.

3. Pitch Clock: 15 Seconds Between Pitches

To speed up the game, MLB will introduce a pitch clock starting in 2023. Key details:

• Teams will have 15 seconds to pitch after a batter is ready.
• If the pitcher exceeds the limit, the batter is awarded a ball.
• Exceptions will be made for pickoff attempts and stolen base plays.

This rule is modeled after the one used in the Minor Leagues, where it has been successful in reducing game times.

4. New Defensive Positioning Rules

Fielders will be required to stand within a certain distance of their assigned positions. For example:

• Infielders must be within 10 feet of their position (e.g., second baseman near second base).
• Outfielders must be within 20 feet of their assigned depth (e.g., center fielder near center field).
• Umpires will have the authority to move fielders back into position if they violate these rules.

How This Affects Teams: Tactics, Roster Decisions, and Standings

The rule changes will force teams to rethink their strategies, particularly on defense. Teams that have relied heavily on the shift—like the Astros, Braves, and Dodgers—will need to adjust their infield alignments. Meanwhile, pitchers may see an uptick in strikeouts as hitters have more room to work with.

According to FanGraphs, the elimination of the shift could increase home runs by as much as 10-15% due to the added space in the outfield. This could benefit power hitters like Ronald Acuña Jr. (Braves) and Joe Mauer (Twins), who have struggled against extreme shifts.

On the pitching side, starters like Jacob deGrom (Mets) and Max Scherzer (Rangers) may see an increase in strikeouts as hitters have more opportunities to drive the ball. However, relievers could face more pressure to induce weak contact, as the expanded strike zone may lead to more aggressive at-bats.

For teams with strong defensive infields—like the Boston Red Sox or New York Yankees—the new rules could actually benefit them, as they won’t be forced into extreme defensive postures.

What Fans Should Watch For in 2023

The 2023 season will be a proving ground for these new rules. Here’s what to keep an eye on:

1. Offensive Explosion or Bust?

Will the elimination of the shift and expanded strike zone lead to a surge in offense? Early spring training games will be a key indicator. Teams like the Atlanta Braves and Houston Astros, who have relied heavily on defensive shifts, may see a drop in their defensive metrics.

2. Pitch Clock Adjustments

The 15-second pitch clock will be a major adjustment for pitchers and catchers. Some, like Gerrit Cole (Astros), have already been practicing with timers. Others, like Ivan Rodriguez (Rangers), have expressed concerns about the pace of play.

3. Umpire Enforcement

Umpires will play a critical role in enforcing the new rules. Early-season games will test how strictly they call shifts and strike zones. If umpires are inconsistent, teams may try to exploit loopholes, leading to potential disputes.

4. Managerial Strategies

Managers like Dave Roberts (Dodgers) and Brian Snitker (Braves) will need to adapt quickly. Some may experiment with new defensive alignments, while others may focus on pitching changes to slow down the game.

FAQ: Your Questions About MLB’s New Rules

Here are answers to some of the most common questions about the new rules:

Will the pitch clock slow down the game?

No—the pitch clock is designed to speed up the game. In the minors, where the clock has been used for years, game times have decreased by an average of 10-15 minutes per game, according to MLB’s own study.

How will the expanded strike zone affect pitchers?

Pitchers may see an increase in strikeouts as hitters have more room to swing at pitches. However, they’ll also need to be more precise, as umpires will be calling more pitches in the zone as strikes.

Can teams still use bunting or small-ball tactics?

Yes, but the new defensive positioning rules may make it harder to execute certain bunts or double plays. Teams will need to adjust their small-ball strategies accordingly.

Will the new rules help or hurt young players?

Young players, particularly those who have relied on extreme shifts, may struggle at first. However, the increased offense could benefit hitters who have been limited by defensive strategies.

What’s Next: Spring Training and the 2023 Season

The first test of these new rules will come during spring training, with the regular season beginning on March 30, 2023. Fans can expect:

• More home runs and higher offensive numbers.
• Faster-paced games due to the pitch clock.
• Adjustments by managers and players as they adapt to the new environment.

The first official game under the new rules will be the 2023 Opening Day, with the Atlanta Braves hosting the Philadelphia Phillies at Truist Park. This game will be a barometer for how the new rules play out in real-game conditions.

For now, the focus is on spring training, where teams will fine-tune their approaches. Coaches will work with players on the new defensive rules, pitchers will practice under the pitch clock, and umpires will refine their strike zone calls.