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Injury Effect: Impact on Betting Lines

July 6, 2024 by Jeff Donchess

In the dynamic world of sports betting, staying ahead of the game means understanding how various factors can influence outcomes. One critical factor that can significantly alter the landscape is player injuries. At GamedayMath, we’re excited to introduce our "Injury Effect" feature, designed to provide you with precise insights into how player injuries affect win probabilities and betting lines.

What is the Injury Effect?

The Injury Effect is a powerful tool that quantifies the impact of player injuries on a team’s performance. By analyzing the effect of each injury, we provide you with valuable data to adjust your betting strategies accordingly. This feature covers a range of sports, including baseball, hockey, and more, offering specific metrics for each.

How Does the Injury Effect Work?

Our Injury Effect feature analyzes the statistical impact of an injured player on their team’s chances of winning and the overall game dynamics. When multiple players are injured or our software analyzes a significant impact to the lines due to injuries, then the injury icon will be highlighted.

There is a significant injury impact on the Arizona money line.

Here’s how we break it down:

Win Probability Impact for Baseball and Hockey

For baseball and hockey, the Injury Effect shows the change in win probability for each team in percentage form. By assessing the injured player’s contribution to their team, we can estimate how their absence will tilt the odds.

For example:

  • Baseball: If a key shortstop is injured, the win probability for their team might decrease by 2.4%, while the opposing team’s probability increases accordingly.
  • Hockey: The loss of a top defenseman might reduce the team’s win probability by 1.5%, reflecting their critical role in the game.

Point Spread Impact for Other Sports

In sports like football and basketball, the Injury Effect highlights the impact on the point spread. This metric helps you understand how the absence of a player affects the expected margin of victory.

For example:

  • Football: If a star quarterback is sidelined, the point spread might shift by 4 points, indicating a significant change in the expected outcome.
  • Basketball: In the example below, we see that Napheesa Collier is worth 3.38 points to the spread of the game.
Values for each injured player in a WNBA game between the Mystics and Lynx.

Over/Under Impact

In addition to win probability and point spread, the Injury Effect also shows the impact on the over/under in decimal form. This helps you gauge how an injury might influence the total points scored in a game.

For example:

  • Football: The injury of a key defensive player could increase the over/under by 1.5 points, suggesting a potentially higher-scoring game.
  • Basketball: In the example above, Shakira Austin being out means that we expect 0.93 MORE points to be scored in the game. However, if Napheesa Collier doesn't play (she is doubtful), then we'd expect 2.70 LESS points to be scored in the game.

The Injury Effect feature is an invaluable tool for handicappers who want to make informed decisions based on the latest player updates. By understanding the precise impact of injuries on win probabilities, point spreads, and over/under, you can adjust your bets to maximize your chances of success.

Stay informed and stay ahead with the Injury Effect feature at GamedayMath. Equip yourself with the insights you need to navigate the ever-changing sports betting landscape and make the most of every game.


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