the big bambino
International Captain
I'm wondering about that. Sutcliffe had an 11 yr career. I'm thinking it's the volume of tests and their number. So it would be "easier" to maintain a 60 ave over a longer time if your game frequency is less. Maybe bcos you can always prepare yourself and commit to the challenge. It's harder to stay motivated for the volume of international games now, I'm speculating.There's also the time factor to complicate matters. A good run over 60 Tests might be easier to maintain over 4 years compared to 60 Tests in 10 years.
Sutcliffe also played very well against Australia and this helped maintain his average. If he played other nations more frequently his average would've fallen below 60. This is contrary to what you'd expect but he seemed to master Australian bowling and the test program of the day played to that advantage.
I'll post some more but if you are looking for a factor that could undermine Bradmans ave then scheduling could possibly be it.