Steelers go from 10-point favorites to 6-point favorites with Ben Roethlisberger out

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The sports betting market says the difference between Ben Roethlisberger and Mason Rudolph is around four points.

The Steelers were 10-point favorites over the Lions today until they announced that Roethlisberger is exterminated with COVID-19. With Mason Rudolph starting, the Steelers are now six-point favorites.

Changing betting lines after a quarterback is ruled out provides a good estimate of how much better a team’s starting quarterback is perceived as their backup. The point spread changed by seven points when Jordan Love replaced Aaron Rodgers for the Packers last week. The point spread changed by five to six points when Cooper Rush replaced Dak Prescott for the Cowboys two weeks ago.

Rudolph started nine games in his career and the Steelers are 5-4 in those games.

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