The team's rebounding and defense improved with him in the lineup in 2009–10. In February 2010, he had a career-high 17 rebounds in his first career start against Maryland, cementing his spot in the starting lineup. He was a key supporting player of the team, and was 7th in the ACC with 7.7 rebounds per game (and 2nd on the offensive boards, with 3.5 rebounds per game). Per 40 minutes of play, he averaged 16.8 rebounds. Zoubek led the NCAA in pace-adjusted offensive rebounding at 7.8 per 40 minutes for the season and is second in this category for the past decade - only DeJuan Blair of Pittsburgh has put up better numbers. He ended his career 4th on Duke's all-time list in offensive rebounds (276), and in his senior year set the school's single-season record of 145. He was also named to the All-ACC academic team.