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December 6, 2008

Posted by Ric Finlay at in Trivia

The optimum age for a cricketer





According to this graph, experience outweighs youthful exuberance more times than it doesn’t (Click here for a bigger image) © Ric Finlay
Our CSW database has the capacity to analyse data by age, so I decided to use it to investigate what age(s), if any, provided significantly better performances.

My sample was Sheffield Shield data since 1977, when the newest state, Tasmania, entered the competition. This provided reasonably homogenous data, with little of the cultural variation that might be obtained using Test match data. The sample thus analysed over nearly 950 matches, involving 800 players.

The results are in the table below:

Age-wise averages with bat and ball in Sheffield Shield since 1977
Age Batting average Bowling
<20 28.34 34.01
20 26.66 35.78
21 29.08 36.45
22 30.55 36.92
23 30.31 36.10
24 31.23 34.93
25 30.77 33.22
26 31.67 33.56
27 30.99 32.75
28 31.53 32.86
29 32.41 31.45
30 33.96 30.58
31 32.35 32.19
32 34.63 30.42
33 31.64 29.93
34 30.71 31.19
35 32.72 33.32
>35 33.06 34.97

What, if anything, can be deduced from the results? Well, clearly, both batting and bowling averages improve as one gets older, but the extent to which this happens after the age of 30 surprises me. The picture of the young, virile cricketer in his early-20s emerging triumphant over the aging has-been is not sustained by this data, and it would seem that experience outweighs youthful exuberance more times than it doesn’t. For both batsmen and bowlers, the ages of 32 - 33 are the vintage years, and perhaps we are too keen to write players off as they move through their early-30s.

I would be most interested to read of the comments by others in relation to this data, and data from other spheres of cricket.

Comments (21)

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Y Anantha Narayanan has over 35 years of IT background. Over the past 15 years, he has been concentrating on Cricket analysis and software development. He has been involved with StumpVision, Wisden, Hallmark Software and his own site www.thirdslip.com during this period.
David Barry
David Barry was cricket-starved when teaching English in France, and study of cricket stats was his only way to stay sane. He is now back in Brisbane, Australia, and working towards a PhD in Physics. He once played for the worst team in the G-division of Muscat's cricket league.

After doing an MBA in marketing and working in an advertising agency, S Rajesh decided that his skills might be put to better use by number-crunching on cricket. He hasn’t regretted that decision in the last six years, and edits the Numbers Game column on cricinfo.com every Friday.

Andrew Samson had his moments with bat and ball, once scoring 43 and taking 3 for 14 with his legbreaks, but he was much better at arithmetic, which explains why he is where he is today. Andrew has been keeping cricket stats since the days when it used to be done with pen and paper, and has been involved in scoring/stats for Radio and TV since 1987. He has been Cricket South Africa's official statistician since1994.
Charles Davis
A former scientist and occasional TV quiz champion, Charles Davis now works full time at sports statistics in Melbourne. His only real contribution to the Test record books came at age 4, when he formed part of the record 90,800 crowd who saw West Indies at the MCG in 1961. He has two books to his credit, and claims to be the only cricket statistician ever who has been quoted in the New York Times and in Australian Federal Parliament on the same day. Not to be confused with the West Indian batsman Charlie Davis, especially in terms of ability.
Ric Finlay
Having just taken early retirement as a Mathematics teacher in Hobart, Ric Finlay now fully devotes his time to recording cricket, both past and present, for the popular CSW cricket database, along with his colleague David Fitzgerald (www.tastats.com.au). His interest in the game is inversely proportional to his ability as a player, but he did once score a century after being dropped at 3 and running out three of his team-mates. His first memory of international cricket is the 1962-63 MCC tour of Australia, described as one of the most boring ever. Totally fascinated, he was instantly hooked, and has never looked back. Author of three books on cricket of a historical nature, he has provided statistics and scored for radio and television cricket coverage since 1983.
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