Run Line Cover Probability Calculator

What this page can answer

The working question for projected margin is narrow: estimate the selected side's margin and probability of covering the entered spread. Within this calculation, keep the arithmetic separate from the later decision about price and stake.

Read the projected margin from the selected side and preserve the sign of the handicap.

The Bullpen Adjustment handles a different calculation and should open as a new case.

From entries to the answer

The two ratings and venue context create a projected margin.

Cover probability then depends on selected side, spread, and expected variation.

On this page, no live price, rating, or result is inferred.

Input scope and units

• For projected margin, Team rating represents power rating relative to an average team.
• When using the result, use a current source for Opponent rating. Here it means opponent power rating on the same scale.
• Label Venue adjustment as observed, quoted, or projected. Its role is positive values favor the selected team.
• Label Market spread as observed, quoted, or projected. Its role is selected team spread. Negative means favored.
• Margin standard deviation records estimated game-to-game variation.

In the current scenario, keep percentages, prices, time, scoring units, and signs in the printed format.

Stress-testing the baseline

• Keep the sportsbook spread fixed while changing the least certain rating or venue input.
• Test margin variation separately from central rating difference.
• Near the line, push rules and discrete scoring matter more than another decimal.

Where input quality can fail

Pushes and common scoring margins can weaken a continuous approximation near key numbers.

For the saved case, a pitcher or lineup change can invalidate a projection before the posted price visibly moves.

At this stage, starting pitcher, bullpen workload, park, weather, batting order, and handedness should be current for the scheduled game.

Moving to puck line cover probability changes scope. Open the Puck Line Cover Probability.

A second set of values

Under the entered assumptions, use changed inputs to reproduce the calculation before entering current information.

Begin with Team rating at its loaded example value and keep the other displayed defaults.

Method: projected margin = team rating − opponent rating + venue adjustment.

For this market, a clean reproduction is not evidence that the inputs are accurate.

A close spread result is sensitive to rating scale and venue.

Preserve the quoted line while testing one assumption.

For the saved case, near the market, input range and grading matter more than extra decimals.

After documenting projected margin, the RBI Prop can answer another question.

To compare first five innings run line separately, open the First Five Innings Run Line after saving this baseline.

Recording sources and timing

At this stage, start a new case when period, participant, settlement rule, or source definition changes.

In this model, retain baseline and cautious cases when Team rating remains uncertain.

For the selected event, keep current availability separate from the stored estimate.

Unmodeled information

• Power ratings should share one scale and reference point.
• As a practical check, check listed-pitcher conditions, innings covered, postponement treatment, official scoring, and extra innings.
• For this comparison, the calculation cannot verify whether every source was collected at a compatible time.

Common interpretation questions