Pierre moved up in terms of the league he is playing in. The first season he played in Germany and this year moved to a team in Italy which plays in Serie A(the top league) and that made it to the Round of 16 the Fiba Euro Cup.
My guess is that he just ended up on a team with some better players and didn't get as much playing time so his production went down
http://basketball.eurobasket.com/tea...ari/294?Page=3
Dug a little further and it looks like he was more productive in the Champions League games where he averaged 12.6 ppg over 14 games and was playing 27mpg. I think Jablonski just used his stats from the Italian Serie A games