Complex sentence: She was with the team for the 2008/2009 season, in which the team appearing in the league's Grand Final, in which she had 15 points and 11 rebounds.
Split into simpler sentences: She was with the team for the 2008/2009 season, with the team appearing in the league's Grand Finals. In the 2008/2009 grand final, she had 15 points and 11 rebounds.