How reliable is Kevin Pietersen?

Available for over a year

England Cricketer Kevin Pietersen's performance in the recent test match between England and India has been hailed as a match winning performance. He has been widely praised as one of the best England batsmen of the current era and possibly of all time. But in the first test match he only scored 19. So can England really not do without him or does his batting average(currently a creditable 49.86) hide inconsistencies in his performance? Zero – why zero is an even number? (Image: England batsman Kevin Pietersen. Credit: INDRANIL MUKHERJEE/AFP/Getty Images)