DeHaan's choice of university erupted into a national recruiting war, with offers coming from as far away as Tennessee, Connecticut, Purdue, Louisiana State, Duke and Kentucky. DeHaan chose Michigan State University (after narrowing her choices to Michigan State, Grand Valley State, and Cornerstone University) and had one of the most dominant freshman seasons in
Big Ten history. DeHaan said she chose MSU because "I have the opportunity to win a national championship, and equally pursue another dream of becoming a doctor at the same time."
Freshman In her collegiate debut on November 17, 2006, DeHaan scored a team-high 15 points. Two days later, she set a then-school-record with eight blocked shots, seven of which she made in the second half, as well as scoring her first career
double-double in the game, scoring 11 points, and making 11 rebounds. On November 24, 2006, DeHaan scored 17 points and nine rebounds in a game her team won 85–66. Her dominance continued on November 29, 2006, when she made another career-high 28 points and 10 rebounds for her second career double-double, which was the second-highest game total for a freshman in Michigan State history. In her first season, DeHaan earned spots on the All-Big Ten Second Team and the All-Big Ten Defensive Team, as well as the Big Ten All-Tournament Team. DeHaan began her first season by setting a string of new school records, including smashing the school's previous single-season blocks record in her first twelve games. She scored 145 points, beating the previous record of 57 points set by
Kristen Rasmussen. DeHaan's 69 blocks during Big Ten regular-season games was the third-best mark in the school's history, just 27 points behind Trish Andrew's mark of 96 set in the 1991–1992 season. During the summer of 2007, DeHaan played at the
2007 FIBA Under-19 World Championship in
Bratislava,
Slovakia, leading the successful Team USA, which won a gold medal. DeHaan was ranked second amongst all players at the tournament with 19 blocks. In the tournament she averaged 5.0 points and 6.6 rebounds. On December 16, 2007, she became MSU's all-time leader in blocked shots. She reached the mark in just 43 career games. With three blocks on December 20, DeHaan became the fastest player in NCAA Division I history to reach the 200-block milestone while playing in her freshman and sophomore seasons.
Junior DeHaan became the Big Ten career blocked shots leader, MSU's 19th 1,000-point scorer, and was named Second Team All-Big Ten by both the coaches and media. She appeared in all 33 games, and averaged 10.8 points, ranking her second on the team and 19th in the Big Ten. She added a team-bests in 6.3 rebounds (13th in the conference) and 3.2 blocks, Led the team and Big Ten with 107 blocks, placing her third in the nation and third on the MSU single-season list. She was second on the team and ninth in the Big Ten with a 46.5% field goal percentage. She had 18 double-figure scoring efforts and two double-doubles; she also added three double-digit rebounding games. She led MSU in scoring in 12 games (11-1 record) and rebounding in 12 games, Big Ten All-Defensive Team, Academic All-Big Ten, and
ESPN The Magazine Academic All-District IV Second Team. She was named to the Berkeley Regional All-Tournament Team.
Senior DeHaan averaged 10.6 points and 5.8 rebounds while blocking 101 shots during her senior season. She left Michigan State ranked as the fourth all-time in career points (1,649), rebounds (919), and is one of just three Spartans to place in the top five of both categories. She also ranks third in MSU history in made field goals (640) and made free throws (351), and seventh in free throw percentage (79.8%). DeHaan finished her career with four-year averages of 12.1 points, 6.8 rebounds, and 3.7 blocks per game. She is also ranked second all-time in Division I with 503 career blocks. Shortly before the end of her final season in March, DeHaan was in a game when she was hit in the back and it flared up. She had played a mere eight minutes before leaving early in the first half with back spasms and did not return. It was later revealed that she was playing with a herniated disc. DeHaan took a medical school placement test during the summer and returned to Michigan State in the fall to finish her degree in human biology. She graduated in December 2010. ==USA Basketball==