2018-19: Highest team score in 1M (356.15), 3M (389.20) and platform (364.40) ... Started the season off with her first win of the year in the 1M against Michigan, adding on a third place finish in the 3M (10/20) ... Notched two more first place finishes, winning both the 1M and 3M events in quad-dual against UIC/Illinois/Chicago (10/26) ... Earned her sixth career Big Ten Diver of the Week award for these wins ... Tallied another Big Ten Diver of the Week recognition for her 2M win and third place finish in the 3M at the ACC/Big Ten Challenge (11/10-11) ... Won every event she competed in, both preliminary and final, at the TYR Invite (1M, 2M, 3M) (11/16-18).
2017-18: Back-to-back National Champion Diver ... NCAA All-American in the 1M and Platform... Became Northwestern’s first ever Big Ten Diver of the Year ... Second-straight championship win in Platform at NCAA Championships ... Also finished eighth in the 1M and ninth in the 3M ... Qualified for the NCAA Championships for the third year in a row ... Awarded Co-Diver of the Big Ten Championships ... Won the 3M event at the Big Ten Championships, setting a school-record high score of 389.95... Also placed second in the platform event and fourth in the 1M at the Big Tens... Took first in the 1M and second in the 3M versus No. 4 Georgia (10/20) ... Posted back-to-back wins in the 3M and second place finishes in the 1M, against Georgia Tech (10/21) and Illinois/Rutgers (10/27) ... Claimed the top spot in both the 3M and the 1M versus Chicago/UIC (10/28) and against Wisconsin (11/11) ... Recorded two first place finishes in the 3M and the Platform, along with one second place spot in the 1M, at the TYR Invite (11/17-19) ... Took the top spot in both the 1M and 3M events in Northwestern’s win over Iowa (1/20) ... Tallied two second-place finishes in triple dual against Minnesota and Purdue, in 1M and Platform (1/26-27).
2016-17: Sophomore diver who became Northwestern’s first-ever National Champion with a career-best score and first-place finish in the platform… Also finished eighth at the NCAA Championships (3/18) in the 3M… Competed in the 1M as well… First Wildcat to earn multiple All-America honors since the 1999-2000 season… Placed second in both the 1M and platform at the Big Ten Championships (2/15), setting a Northwestern record for both… Finished tenth in the 3M… Second on the team with 11 first-place finishes…Started the season by winning the 1M and 3M at the Chicago Quad-Dual (10/22)… Won the 3M and platform events at the TYR Invitational (11/20)… At the UK Quad-Meet (11/5), took second in in the platform, sixth in the 1M and first in the 3M… Placed second in the 1M… Claimed another victory in the 3M and third-place finish in the 1M against Illinois and Rutgers (10/29)… Placed first in the 1M and 3M against Notre Dame (1/14)… Recorded two more first-place finishes in the 1M and platform at Iowa (1/21)… Academic All-Big Ten.
2015-16: Freshman phenom member of the diving corps ... Top NU diver in the 1-meter, 3-meter and platform events ... Silver medal winner from the platform at Big Ten Championships ... Four-time Big Ten Freshman of the Week ... Awarded Big Ten Diver of the Week once ... Qualified for the NCAA Championships in 1-meter and platform ... Finished in first place in the platform diving competition at the NCAA Zone C Diving Championships with a cumulative (preliminary and final) score of 647.35 ... The total score was the best sum of any diver in Division I Zones ... Reached the championship final in all three events at the Big Ten Championships ... Scored 321.45 points from the platform in the final, finishing in second place ... Also had a fourth-place finish from the 3-meter springboard (344.95 points ) ... Finished in first place every time out from the 3-meter springboard in the regular season ... Only participated in the 1-meter event in the triple dual versus Minnesota and Purdue (1/29-30) and recorded a third-place score of 292.70 ... Broke a 15-year Norris Aquatics Center pool record from the 1-meter springboard with her first-place score of 317.63 against Iowa (1/23) ... Mark was also a season-high ... Won her fourth Big Ten Freshman of the Week (Jan. 27) award this season after her performance ... Also was the Big Ten Diver of the Week (Jan. 27), NU's first such award since 2011 ... Recorded a score of 298.35 from the 1-meter springboard at Notre Dame (1/16) ... Also notched a first-place finish in the 3-meter competition (334.70) ... Registered first-place finishes in the 1-meter, 3-meter, and platform competitions at the TYR Invitational (11/20-22) ... Won Big Ten Freshman of the Week (Nov. 15) for the second time this season after her performance ... Set a personal record from the 1-meter springboard (289.43) despite finishing second versus Wisconsin (11/14) ... Crushed her personal record set the week before from the 3-meter boards, bringing home a score of 349.50 ... The next-closest diver was 77 points below her ... Finished in first from the 1-meter boards, as well ... Her performance earned her Big Ten Freshman of the Week honors (Nov. 4), her first collegiate distinction ... Broke Chicago's pool record from the 3-meter boards with a score of 318.98 at the Chicago Quad (10/24), finishing in first ... Also placed first in the 1-meter boards (281.18), pacing the 'Cats' divers in a 1-2-3 finish.
High School: Already an accomplished diver on a national and international level ... Took home bronze at the 2015 World University Games in Gwangju, South Korea ... Finished third on the platform at the 2014 AT&T National Diving Championships ... Took second on both springboards and fifth on the platform at the 2014 USA Diving Junior National Championships ... Competed on both springboards at the 2014 FINA World Junior Diving Championships, finishing 13th in the 3-meter event ... Took eighth on the platform at the 2014 Pan American Festival ... Is a two-time CIF-SS Division 3 champion, earning the highest score in all divisions in the entire state while winning the 2014 title ... Recorded perfect 10 scores on two dives in 2014 ... CIF-SS record holder ... Dove with the Trojan Dive Club from 2004-14 ... Three-time national champion, earning national team berths in 2007 and 2014 ... Earned CSF Academic Honors Award each year from 2011-15 ... Named a Scholar-Athlete from 2011-14 and 2014 Athlete of the Year ... AP Honors Award.
Personal: Born Olivia Louise Rosendahl ... Daughter of Anne Kosco and Dan Rosendahl ... Chose Northwestern over Stanford ... Majoring in French and International Studies, minoring in Political Science
Says Diving Coach Alik Sarkisian: "Olivia is a world-class diver who has already had success in national and international competition. She comes from a strong program at the Trojan Dive Club under coach Hongping Li and will make an immediate impact on our program. Olivia has the ability to be a factor not only for the Wildcats but for USA Diving for years to come."
2017-18: Back-to-back National Champion Diver ... NCAA All-American in the 1M and Platform... Became Northwestern’s first ever Big Ten Diver of the Year ... Second-straight championship win in Platform at NCAA Championships ... Also finished eighth in the 1M and ninth in the 3M ... Qualified for the NCAA Championships for the third year in a row ... Awarded Co-Diver of the Big Ten Championships ... Won the 3M event at the Big Ten Championships, setting a school-record high score of 389.95... Also placed second in the platform event and fourth in the 1M at the Big Tens... Took first in the 1M and second in the 3M versus No. 4 Georgia (10/20) ... Posted back-to-back wins in the 3M and second place finishes in the 1M, against Georgia Tech (10/21) and Illinois/Rutgers (10/27) ... Claimed the top spot in both the 3M and the 1M versus Chicago/UIC (10/28) and against Wisconsin (11/11) ... Recorded two first place finishes in the 3M and the Platform, along with one second place spot in the 1M, at the TYR Invite (11/17-19) ... Took the top spot in both the 1M and 3M events in Northwestern’s win over Iowa (1/20) ... Tallied two second-place finishes in triple dual against Minnesota and Purdue, in 1M and Platform (1/26-27).
2016-17: Sophomore diver who became Northwestern’s first-ever National Champion with a career-best score and first-place finish in the platform… Also finished eighth at the NCAA Championships (3/18) in the 3M… Competed in the 1M as well… First Wildcat to earn multiple All-America honors since the 1999-2000 season… Placed second in both the 1M and platform at the Big Ten Championships (2/15), setting a Northwestern record for both… Finished tenth in the 3M… Second on the team with 11 first-place finishes…Started the season by winning the 1M and 3M at the Chicago Quad-Dual (10/22)… Won the 3M and platform events at the TYR Invitational (11/20)… At the UK Quad-Meet (11/5), took second in in the platform, sixth in the 1M and first in the 3M… Placed second in the 1M… Claimed another victory in the 3M and third-place finish in the 1M against Illinois and Rutgers (10/29)… Placed first in the 1M and 3M against Notre Dame (1/14)… Recorded two more first-place finishes in the 1M and platform at Iowa (1/21)… Academic All-Big Ten.
2015-16: Freshman phenom member of the diving corps ... Top NU diver in the 1-meter, 3-meter and platform events ... Silver medal winner from the platform at Big Ten Championships ... Four-time Big Ten Freshman of the Week ... Awarded Big Ten Diver of the Week once ... Qualified for the NCAA Championships in 1-meter and platform ... Finished in first place in the platform diving competition at the NCAA Zone C Diving Championships with a cumulative (preliminary and final) score of 647.35 ... The total score was the best sum of any diver in Division I Zones ... Reached the championship final in all three events at the Big Ten Championships ... Scored 321.45 points from the platform in the final, finishing in second place ... Also had a fourth-place finish from the 3-meter springboard (344.95 points ) ... Finished in first place every time out from the 3-meter springboard in the regular season ... Only participated in the 1-meter event in the triple dual versus Minnesota and Purdue (1/29-30) and recorded a third-place score of 292.70 ... Broke a 15-year Norris Aquatics Center pool record from the 1-meter springboard with her first-place score of 317.63 against Iowa (1/23) ... Mark was also a season-high ... Won her fourth Big Ten Freshman of the Week (Jan. 27) award this season after her performance ... Also was the Big Ten Diver of the Week (Jan. 27), NU's first such award since 2011 ... Recorded a score of 298.35 from the 1-meter springboard at Notre Dame (1/16) ... Also notched a first-place finish in the 3-meter competition (334.70) ... Registered first-place finishes in the 1-meter, 3-meter, and platform competitions at the TYR Invitational (11/20-22) ... Won Big Ten Freshman of the Week (Nov. 15) for the second time this season after her performance ... Set a personal record from the 1-meter springboard (289.43) despite finishing second versus Wisconsin (11/14) ... Crushed her personal record set the week before from the 3-meter boards, bringing home a score of 349.50 ... The next-closest diver was 77 points below her ... Finished in first from the 1-meter boards, as well ... Her performance earned her Big Ten Freshman of the Week honors (Nov. 4), her first collegiate distinction ... Broke Chicago's pool record from the 3-meter boards with a score of 318.98 at the Chicago Quad (10/24), finishing in first ... Also placed first in the 1-meter boards (281.18), pacing the 'Cats' divers in a 1-2-3 finish.
High School: Already an accomplished diver on a national and international level ... Took home bronze at the 2015 World University Games in Gwangju, South Korea ... Finished third on the platform at the 2014 AT&T National Diving Championships ... Took second on both springboards and fifth on the platform at the 2014 USA Diving Junior National Championships ... Competed on both springboards at the 2014 FINA World Junior Diving Championships, finishing 13th in the 3-meter event ... Took eighth on the platform at the 2014 Pan American Festival ... Is a two-time CIF-SS Division 3 champion, earning the highest score in all divisions in the entire state while winning the 2014 title ... Recorded perfect 10 scores on two dives in 2014 ... CIF-SS record holder ... Dove with the Trojan Dive Club from 2004-14 ... Three-time national champion, earning national team berths in 2007 and 2014 ... Earned CSF Academic Honors Award each year from 2011-15 ... Named a Scholar-Athlete from 2011-14 and 2014 Athlete of the Year ... AP Honors Award.
Personal: Born Olivia Louise Rosendahl ... Daughter of Anne Kosco and Dan Rosendahl ... Chose Northwestern over Stanford ... Majoring in French and International Studies, minoring in Political Science
Says Diving Coach Alik Sarkisian: "Olivia is a world-class diver who has already had success in national and international competition. She comes from a strong program at the Trojan Dive Club under coach Hongping Li and will make an immediate impact on our program. Olivia has the ability to be a factor not only for the Wildcats but for USA Diving for years to come."
ROSENDAHL'S CAREER BESTS
| Event | Career Best |
| 1 meter | 354.55 |
| 3 meter | 389.95 |
| Platform | 368.05 |