Who's always batted as an opener? Who's always batted at number 11? An analysis of batting positions of the players over the years shows an interesting titbit - the top ten in terms of long careers includes many openers, but the top ten batsmen by average isn't so favourable to openers.
http://thirdslip.com/2005/jan/tst-batpos.shtm
- Third Slip
http://thirdslip.com/2005/jan/tst-batpos.shtm
- Third Slip