The 2011-12 campaign delivered a strong promotion push for Sparta Rotterdam as Kasteelheren, under first-year coach Michel Vonk, finished a valiant 2nd in the Eerste Divisie. Leading the attack was the prolific forward Jeremy Bokila, whose 15 goals helped fire the team to a top-two finish and a coveted place in the promotion play-offs. However, the season ended in heartbreak as they narrowly lost their play-off tie against eventual promotees Willem II. It was a competitive year that established the club as genuine contenders for a top-flight return and remains a defining chapter of a strong but ultimately frustrating campaign.