SINCE moving from Hawthorn to the Sydney Swans at the end of the 2009 season, Josh Kennedy has emerged as one of the most dominant performers in the game.

In the past three seasons, the 24-year-old has won a premiership, enjoyed a hat-trick of top-three finishes in the Swans' best and fairest and been selected in the All Australian team.

And his standing in the game has been confirmed by the Official AFL Player Ratings, brought to you by Vero, in which Kennedy sat at No. 9 after round four.

Kennedy ranks highly in several key categories that are considered when calculating a player's rating.

Champion Data's statistics show that since 2011 Kennedy has been first in the competition for contested possessions and clearances, third in forward half disposals, 10th in tackles and 13th in winning clearances that result in goals.

"He has clearance ability like no other," Fremantle skipper Matthew Pavlich told AFL.com.au.

The Official AFL Player Ratings will be launched by afl.com.au on Friday, May 9.

The ratings are the result of the most sophisticated, detailed and wide-ranging statistical system ever devised for AFL footy.

Official AFL Player ratings will allow fans to determine where more than 650 listed players rank against each other.

A player's most recent 40 matches are used in the calculation of his rating.

If you are keen to find out exactly how the ratings work, you can read the initial FAQ here.

Kennedy is the second player to make the initial top-ten rankings, following Carlton's Chris Judd being named at number 10.

"I think what makes (Kennedy) so good is his understanding of how to work a stoppage," Adelaide star Scott Thompson said. "He has strong body position and owns the area he wants."

According to Brisbane Lions co-captain Jonathan Brown, Kennedy is "as good a contested footy player as there is".

* The top 10 that we are counting down in the lead-up to the launch of the Official AFL Player Ratings, brought to you by Vero, is how it stood after round four of this season.