Pete Palmer , a leading sports statistician , had been working on the book since 1990 .
Pete Palmer , a leading sports statistician , had took charge of the content in 2008 , with Rory Slifkin as managing editor .
Pete Palmer , a leading sports statistician , had been working on the book since 1990 and took charge of the content in 2008 , with Rory Slifkin as managing editor .