WALLS' PERSONAL BESTS
| Event | Personal Best |
| 200 freestyle | 1:55.24 |
| 500 freestyle | 5:05.29 |
| 1,650 freestyle | 17:59.66 |
2010-11: Senior member of Northwestern's distance freestyle unit ... Big Ten Distinguished Scholar ... Academic All-Big Ten ... Competed in the 500 free (60th), 100 free (75th) and 200 free (79th) at the Big Ten Championships ... Earned a pair of consolation final appearances at NU's own six-team TYR Invitational (11/19-11/21), placing 12th in the 500 free and 15th in the 200 free ... Best dual-meet finish of the year was a fifth-place effort in the 500 free in NU's quad dual (11/6).
2009-10: Academic All-Big Ten ... Qualified for the bonus finals in the 200 back and 500 free at the six-team TYR Invitational ... Also competed in the 100 and 200 freestyle races at the TYR ... Best dual-meet finish of the year was a fifth-place effort in the 500 free against UIC (11/14).
2008-09: Distance freestylist for the Wildcats ... Competed in the 200 free, 500 free and 1,650 free at the Big Ten Championships, swimming a career-best time in the 200 race ... Earned a 10th-place finish in the 1,650 free at the TYR Invitational (11/21) ... Also competed in the 50 free, 200 free, 500 free, 100 back and 200 back at the event ... Best dual-meet finishes of the year came in the form of two sixth-place efforts in the 1,000 free at Illinois-Chicago/University of Chicago (11/15) and Iowa (1/24) ... Broke 18:00 in the 1,650 free for a career-best effort in the event in a dual meet versus Notre Dame and Toledo (1/10) ... Swam a career-best 5:07.69 in the 500 free during an exhibition heat against Michigan (1/17) ... Academic All-Big Ten.
2007-08: Member of Northwestern's distance free group, but also competed in the 100 and 200 free events during the year ... Swam in the 200 free, 500 free and 1,650 free events at the Big Ten Championships ... Best dual-meet finish of the year came in a third-place result in the 500 free against No. 13 Michigan on Jan. 19.
High School: Four-year varsity letterwinner in swimming ... Team MVP ... Tucson Citizen Swimmer of the Week ... Region Champion ... Competed in High School State and Nike Classic All-Star events ... Won Southern Arizona Aquatic Association Championship with club team ... National Merit Finalist and scholarship winner ... Salutatorian ... AP Scholar with honors ... Wendy's High School Heisman nominee.
Personal: Born Caroline Jolene Walls ... Daughter of Lisa and Steve Walls ... Brother, Daniel, swam for NU's men's team from 2004-08 ... Chose Northwestern over Emory, Vanderbilt, California, UCLA and UC San Diego ... Majoring in mathematical methods in the social sciences (MMSS) and political science with an environmental policy and culture minor.