Test cricket, a leisurely sport that spans several days, has undergone significant changes throughout its 150-year history. From the “bodyline” era in the 1930s to the introduction of one-day matches and World Series Cricket in the 1970s, and the emergence of Twenty20 cricket in 2005, the sport has continuously evolved. Now, a new style of play called “Bazball” developed by England coach Brendon “Baz” McCullum may be another pivotal moment in Test cricket.
Bazball is an aggressive and attacking approach that aims to score runs quickly and achieve conclusive results in matches that often end in draws due to time constraints. It is a high-risk, high-reward strategy that has sparked debate among cricket fans about its merits and whether it will have a lasting impact on the sport.
McCullum, a former New Zealand captain known for his fast scoring as a batsman, took over as England’s head coach after a disappointing 4-0 loss to Australia in the Ashes series two years ago. He is the first international head coach to have played the majority of his career in the fast-paced Twenty20 format.
With McCullum’s appointment, England has adopted an extremely attacking style of play, which has been dubbed “Bazball” by Cricinfo editor Andrew Miller. This shift in England’s approach has attracted global attention and generated discussions about the stark change in their play.
To determine whether Bazball is a genuine break from Test cricket’s history, statisticians have analyzed the statistical data of the game. They found that the average run rate per six-ball over has remained relatively stable throughout the history of Test cricket. However, over the past 20 years, the run rate has steadily increased and reached its highest point in Test cricket’s history.
To compare Bazball to the past, statisticians built a statistical model that predicted and captured the variability of run rates in Test matches. They analyzed data since 2000, excluding innings with a total score of less than 200 to focus on longer innings. The model successfully captured how the mean and variance of run rates changed with the year and innings total.
By measuring the deviation of a given innings from the model’s prediction, statisticians determined a “run rate score” that indicated how unusual the innings was. They found that out of the top 30 estimated run rate scores, eight were Bazball innings. This strong evidence suggests that Bazball is a real phenomenon and represents a significant departure from traditional Test cricket.
As Bazball faces its toughest challenge against the Australian pace attack and prepares for an away series in India next year, cricket enthusiasts will be closely watching to see if other teams adopt this revolutionary style of play.