2014-15: Senior with experience in the 100 free, fly and backstroke races stepped up to add depth to the 100 breaststroke for the first time in his career … Academic All-Big Ten ... Ranks fifth for the Wildcats in the 100 breast following the season … Finished 39th in the Big Ten in the 100 breast with a career-best time of 57.16 … Placed 57th in the 100 free and had a career-best 21.06 in the 50 free during a time trial at the B1G meet … Scored a point for NU at its home TYR Invitational (11/21-11/23) with a 16th place finish in the 50 back … Earned bonus swim lanes at the TYR in the 50 breast (18th), 100 breast (19th), 100 free (20th) and 100 fly (21st) … Best dual-meet finishes were sixth-place efforts in the 100 breast at No. 19 Wisconsin (11/13), the 100 fly against Eastern Michigan (10/16) and the 100 free versus Milwaukee (1/16).
2013-14: Academic All-Big Ten ... Set career bests in 100 back (52.40) and 100 free (46.25) ... Competed in the Big Ten Championships in the 50 free, 100 fly and 100 free ... Swam in the finals of the TYR Invitational in the 50 breast, 100 fly, 100 back, and 50 fly ... Finished fourth in the 100 back vs. E. Mich/Illinois (10/18) ... Finished seventh in the 100 back and sixth in the 100 fly vs. WKU (10/25) ... Finished eighth in the 100 fly vs. ND, Michigan (1/11) ... Finished seventh in the 100 fly vs. Iowa (1/25).
2012-13: Member of Northwestern's free, fly and backstroke groups ... Academic All-Big Ten ... Finished the year ranked fourth on NU's top times list in the 100 fly ... Swam in the 100 fly (42nd), 100 free (64th) and 50 free (65th) at the Big Ten Championships ... Competed in five different events at the Wildcats' own four-team TYR Invitational (11/16-11/18), earning second swims in all of them and scoring points with an 11th-place overall finish in the 50 fly ... Swam in the TYR bonus finals of the 100 back (finishing 17th overall), 100 fly (18th), 100 free (19th) and 50 free (22nd) ... Best dual meet of the season came in a pair of sixth-place finishes in the 100 fly and 100 back at Milwaukee (1/16).
2011-12: Finished the season ranked fourth on Northwestern's top times list in the 100 fly ... Competed in the 100 fly (38th), 50 free (61st) and 100 free (67th) at the Big Ten Championships ... Best dual-meet finish of the season was a third-place in the 100 free against Lewis and Carthage College (1/7) ... Twice scored dual-meet points with fifth-place efforts in the fall, earning those finishes in the 200 fly at Eastern Michigan (10/21) and in the 100 fly against Purdue (11/5) ... Scored points in the consolation final of the 50 breast at Northwestern's own five-team TYR Invitational, placing 14th overall ... Also made the TYR Invite bonus finals in the 100 back (18th),100 fly (20th) and 50 fly (24th).
High School: All-American and all-Ohio in the 100 free and 100 fly in both 2010 and 2011 ... State champion in the 100 free in 2010 ... Finished runner-up in the state in the 100 fly in 2010 and the 100 fly and 100 free in 2011 ... Ranked as the 10th-best recruit in the state of Ohio by Collegeswimming.com... Earned team's MVP honor in 2011 and the Most Inspiration Swim award for his 100 free in 2010 and with the 400 free relay in 2011 ... USA Swimming Scholastic All-American in the 50 free, 100 free, 100 fly, 100 back, 100 breast and 200 IM during his career ... Led Columbus Academy to the District title in 2010 and a district runner-up performance in 2011 ... In both of those seasons, team was fifth at State ... That is the best finish in school history ... Holds school records in the 100 free, 100 fly and 400 free relay ... Held the Division II state record in the 100 fly before it was broken during the 2011 state finals ... Swam nine years of club with the Greater Columbus Swim Team of Ohio ... Co-captain of the club in 2010-11 ... Competed at Junior Nationals in August and December of 2010 in the 100 free, 100 fly and 100 back ... Earned age group motivational AAAA times in the 50 free, 100 free, 100 fly and 100 back ... National Merit Scholar ... AP Scholar with Distinction.
Personal: Born William W Rosler ... Son of Russ and Dani Rosler ... Uncle, Randy, swam backstroke at South Carolina ... Cousin, Scott, swims at Missouri ... Uncle, John, ran cross country at Davidson ... Chose Northwestern over Denison ... Majoring in economics with a minor in business institutions.
ROSLER'S PERSONAL BESTS
| Event | Personal Best |
| 100 breaststroke | 57.16 |
| 100 butterfly | 50.67 |
| 100 backstroke | 52.40 |
| 50 freestyle | 21.06 |
| 100 freestyle | 46.25 |