Pietersen's deceptive pace and gliding runs make him an unpredictable back-line player, with the ability to break the line at will and create attacking opportunities for his team. He is also a clinical finisher, and was the leading try scorer in the 2007 Super 14 competition with 12 tries from 15 games. Pietersen remains a firm fan favourite for the unpredictable and exciting dimension his play brings to the team. Before the emergence of Francois Steyn at the Sharks franchise, Pietersen was seen as the ideal replacement for Percy Montgomery as fullback, however with Steyn being able to play at fullback, wing or fly-half, Pietersen focused on wing as his primary position, and it is in this role that most of his appearances have been made for club and country.
The top try-scorer in the 2007 Super 14 failed to score even one in 2008, a fact acknowledged by both AJ Venter and Stefan Terblanche in the October 2008 edition of SA Sports Illustrated.