2017-18: Highly successful senior freestyler ... Contributed to a schol-record time in the 200 medley relay, earning the relay team fifth place at the Big Ten Championships with her freestyle run ... Set season-best times in the 50 and 100 free at the Big Tens, finishing 14th and 15th ... Also lead the relay teams to sixth-place finishes in the 200 and 400 free relays ... Started off the season with back-to-back wins in the 50 free, against No. 4 Georgia (10/20) and Georgia Tech (10/21) ... Continued the streak with two more victories in the 50 free in team wins against Illinois/Rutgers (10/27) and Chicago/UIC (10/28) ... Took home four event wins at the TYR Invitational (11/17-19), in the 200 and 400 free relays, and with pool record times in the 200 medley relay and the 50 free ... Maintained her unbeaten streak in the 50 free with two more wins, contributing to defeats of Florida Gulf Coast (12/17) and Iowa (1/20) ... Also took home a first place finish in the 100 free against FGCU, and a second place finish against Iowa ... Took home second place in the 50 free in triple dual against Purdue and No. 18 Minnesota (1/27).
2016-17: Tremendous junior freestyle and fly swimmer… First on the NU Top Times list in the 50 free, second in the 100 free and third in the 100 fly… also on the list in four other events… Swam a career-best 50 free (22.46), 100 free (49.72) and 100 fly (54.71) at the Big Ten Championships (2/15)… Finished third in the 50 free and earned an NCAA ‘B’ Qualification… Finished third or better in the 50 free at every meet she attended… Also finished 18th in the 100 free at the Big Ten Championships with a ‘B’ Cut time… Member of the 200 and 400 relay teams that took seventh and member of the 200 and 400 medley relay teams that placed 11th… Began the season by winning the 50 free and taking second in the 100 fly at the Chicago Quad (10/22)… Claimed victory in the 50 and 100 free at the Illinois/Rutgers Triple Dual (10/29)… Once again won the 50 free and finished fifth in the 100 free at the UK Quad Meet (11/5)… Came in second at the TYR Invitational in the 50 free and 100 IM, finished ninth in the 100 free and placed 11th in the 50 breast… Recorded a second place finish in the 50 free and a fourth place finish in the 100 fly against Notre Dame (1/14)… Again won the 50 free against Iowa (1/28) and came in third in the 100 free… Took second in the 50 free and eighth in the 100 fly at the Purdue Triple Dual (1/28).
2015-16: Tremendous sophomore freestyler ... Qualified for a second swim in the 50 free at the Big Ten Championship (2/18-20) ... Finished in 14th place in the 50 free (22.86) ... Swam season-best times in the 50 free and 100 breast at the Championships ... Picked up a first-place finish in the 50 free in the triple dual versus Minnesota and Purdue (1/29-30) ... Improved her season-best time in the 50 free while recording an NCAA 'B' cut with her time of 22.94 versus Iowa (1/23) ... Continued her first-place streak in the 50 free at Notre Dame (1/16), finishing in 23.27 ... Swam the 50 free with a time of 22.98 at the TYR Invitational (11/20-22) ... That time qualified her for an NCAA 'B' cut ... Also had a first place finish in the 100 IM (56.24) ... Added to her performance with a season-best time of 50.67 in the 100 free ... Placed first for the second consecutive meet in the 50 free with a time of 23.39 versus Wisconsin (11/14) ... Also recorded a season-best in the 100 free with a fourth-place time of 51.88 ... Earned a first-place finish in the 50 free (23.38) and a second-place finish in the 100 free (52.30) at Illinois (10/30) ... Finished second in the 400 free medley (3:27.17), missing first place by only one tenth of a second ... Demolished her competition in the 100 free (52.05) at the Chicago Quad (10/24), coming in first place ... Was one of four NU swimmers to finish in first place in the 200 medley relay with a time of 1:45.05, breaking a pool record ... Similar team also placed first in the 400 freestyle relay.
2014-15: Along with teammate Annika Winsnes, formed a formidable 1-2 sprint freestyle punch for Northwestern … Finished first or second in the 50 freestyle in every outing this year including racking up six victories leading into the Big Ten Championships … Ranked first on NU's top times list for the season in the 50 free, second in the 100 free and fourth in the 100 breast … Swam with the Wildcats' top 200 free, 400 free and 200 medley relays … The 400 free relay set a Norris Aquatics Center pool record in the fall … The 200 free relay broke the Norris Aquatics Center pool record on Senior Night against Milwaukee (1/16) … At the 2015 Big Ten Championships, anchored the school-record-breaking 200 medley relay that finishing in a time of 1:39.10 … Led off the 200 free relay at the Big Ten meet with an NCAA 'B' cut and career-best 50 free split of 22.72 to help that relay become the second-fastest in school history … That time made her the fifth-fastest 50 free sprinter in school history … Individually finished 11th in the Big Ten in the 50 free with an NCAA 'B' time of 22.80 in the consolation final … Qualified 19th overall but scratched her lane in the B1G bonus final of that event after swimming a 49.96 that tied her for sixth on NU's all-time top times list in that event … Also competed in the 100 breast (38th) at the B1G meet … Placed herself fifth on NU's all-time top times list in the 50 free with an NCAA 'B' provisional qualifying time of 22.87 in her preliminary heat at Northwestern's home TYR Invitational (11/21-11/23) … Nearly matched that with a 22.93 in the finals to win the event … Was second at the TYR in the 100 free behind Winsnes with a time of 50.91 … Also swam the 50 and 100 breaststroke races at the TYR, winning the consolation finals of both … Won 50 free dual meet races in a season-opening win against Illinois (10/17), against a strong field at the Kentucky Quad Dual (11/7), at No. 19 Wisconsin (11/13) versus Milwaukee (1/16) and in a win at No. 21 Iowa (1/24) … Matched her career-best 50 free time of 22.87 when she swam that 'B' cut again to lead off NU's pool record 200 free relay against the Panthers … All told, recorded points with 13 top-five dual-meet race finishes.
High School: Talented sprinter ... Won Wisconsin Division I state title in 50 freestyle, swimming a time of 23.29 ... Placed 3rd in 100 freestyle, swimming a then-career best 51.34 ... Anchored two state champion relays for Arrowhead High School ... Posted 50 free times of 22.98 in yards and 26.85 in the long course as a junior ... Posted 51.37 time in 100 yard free and 1:52.31 in 200 yard free ... Competed for the Lake County Swim Team.
Personal: Born Mary Claire Warren ... Major is industrial engineering.
2016-17: Tremendous junior freestyle and fly swimmer… First on the NU Top Times list in the 50 free, second in the 100 free and third in the 100 fly… also on the list in four other events… Swam a career-best 50 free (22.46), 100 free (49.72) and 100 fly (54.71) at the Big Ten Championships (2/15)… Finished third in the 50 free and earned an NCAA ‘B’ Qualification… Finished third or better in the 50 free at every meet she attended… Also finished 18th in the 100 free at the Big Ten Championships with a ‘B’ Cut time… Member of the 200 and 400 relay teams that took seventh and member of the 200 and 400 medley relay teams that placed 11th… Began the season by winning the 50 free and taking second in the 100 fly at the Chicago Quad (10/22)… Claimed victory in the 50 and 100 free at the Illinois/Rutgers Triple Dual (10/29)… Once again won the 50 free and finished fifth in the 100 free at the UK Quad Meet (11/5)… Came in second at the TYR Invitational in the 50 free and 100 IM, finished ninth in the 100 free and placed 11th in the 50 breast… Recorded a second place finish in the 50 free and a fourth place finish in the 100 fly against Notre Dame (1/14)… Again won the 50 free against Iowa (1/28) and came in third in the 100 free… Took second in the 50 free and eighth in the 100 fly at the Purdue Triple Dual (1/28).
2015-16: Tremendous sophomore freestyler ... Qualified for a second swim in the 50 free at the Big Ten Championship (2/18-20) ... Finished in 14th place in the 50 free (22.86) ... Swam season-best times in the 50 free and 100 breast at the Championships ... Picked up a first-place finish in the 50 free in the triple dual versus Minnesota and Purdue (1/29-30) ... Improved her season-best time in the 50 free while recording an NCAA 'B' cut with her time of 22.94 versus Iowa (1/23) ... Continued her first-place streak in the 50 free at Notre Dame (1/16), finishing in 23.27 ... Swam the 50 free with a time of 22.98 at the TYR Invitational (11/20-22) ... That time qualified her for an NCAA 'B' cut ... Also had a first place finish in the 100 IM (56.24) ... Added to her performance with a season-best time of 50.67 in the 100 free ... Placed first for the second consecutive meet in the 50 free with a time of 23.39 versus Wisconsin (11/14) ... Also recorded a season-best in the 100 free with a fourth-place time of 51.88 ... Earned a first-place finish in the 50 free (23.38) and a second-place finish in the 100 free (52.30) at Illinois (10/30) ... Finished second in the 400 free medley (3:27.17), missing first place by only one tenth of a second ... Demolished her competition in the 100 free (52.05) at the Chicago Quad (10/24), coming in first place ... Was one of four NU swimmers to finish in first place in the 200 medley relay with a time of 1:45.05, breaking a pool record ... Similar team also placed first in the 400 freestyle relay.
2014-15: Along with teammate Annika Winsnes, formed a formidable 1-2 sprint freestyle punch for Northwestern … Finished first or second in the 50 freestyle in every outing this year including racking up six victories leading into the Big Ten Championships … Ranked first on NU's top times list for the season in the 50 free, second in the 100 free and fourth in the 100 breast … Swam with the Wildcats' top 200 free, 400 free and 200 medley relays … The 400 free relay set a Norris Aquatics Center pool record in the fall … The 200 free relay broke the Norris Aquatics Center pool record on Senior Night against Milwaukee (1/16) … At the 2015 Big Ten Championships, anchored the school-record-breaking 200 medley relay that finishing in a time of 1:39.10 … Led off the 200 free relay at the Big Ten meet with an NCAA 'B' cut and career-best 50 free split of 22.72 to help that relay become the second-fastest in school history … That time made her the fifth-fastest 50 free sprinter in school history … Individually finished 11th in the Big Ten in the 50 free with an NCAA 'B' time of 22.80 in the consolation final … Qualified 19th overall but scratched her lane in the B1G bonus final of that event after swimming a 49.96 that tied her for sixth on NU's all-time top times list in that event … Also competed in the 100 breast (38th) at the B1G meet … Placed herself fifth on NU's all-time top times list in the 50 free with an NCAA 'B' provisional qualifying time of 22.87 in her preliminary heat at Northwestern's home TYR Invitational (11/21-11/23) … Nearly matched that with a 22.93 in the finals to win the event … Was second at the TYR in the 100 free behind Winsnes with a time of 50.91 … Also swam the 50 and 100 breaststroke races at the TYR, winning the consolation finals of both … Won 50 free dual meet races in a season-opening win against Illinois (10/17), against a strong field at the Kentucky Quad Dual (11/7), at No. 19 Wisconsin (11/13) versus Milwaukee (1/16) and in a win at No. 21 Iowa (1/24) … Matched her career-best 50 free time of 22.87 when she swam that 'B' cut again to lead off NU's pool record 200 free relay against the Panthers … All told, recorded points with 13 top-five dual-meet race finishes.
High School: Talented sprinter ... Won Wisconsin Division I state title in 50 freestyle, swimming a time of 23.29 ... Placed 3rd in 100 freestyle, swimming a then-career best 51.34 ... Anchored two state champion relays for Arrowhead High School ... Posted 50 free times of 22.98 in yards and 26.85 in the long course as a junior ... Posted 51.37 time in 100 yard free and 1:52.31 in 200 yard free ... Competed for the Lake County Swim Team.
Personal: Born Mary Claire Warren ... Major is industrial engineering.
WARREN'S CAREER BESTS
| Event | Career Best |
| 50 free | 22.72 |
| 100 free | 49.96 |
| 100 breast | 1:04.05 |