CAREER BESTS
| Event | Time | Date | Site/Opponent |
| 200 Fly | 2:02.35 | 2//26/21 | Big Ten Championships |
| 200 IM | 2:02.35 | 2/20/20 | Big Ten Championships |
| 400 IM | 4:21.61 | 2/21/20 | Big Ten Championships |
Career Accolades
- Big Ten Distinguished Scholar (2020).
- Academic All-Big Ten (2020).
2020-21 (Junior Year)
- Big Ten Championships (2/23-27): Competed in the 200 IM, 200 fly, and 400 IM.
- Ohio State/Rutgers (1/16): Finished eighth in the 200 fly (2:06.64).
- Michigan State (2/5-6): Placed second in the 200 fly (2:06.58) and third in the 400 IM (4:25.55).
2019-20 (Sophomore Year)
- Awards: Distinguished Scholar…Academic All-Big Ten.
- Big Ten Championships (2/19-22): Swam for a pair of personal bests in the 200 IM (2:02.35) and 400 IM (4:21.61).
- Liberty/St. Bonaventure (10/4): Finished second in the 200 IM (2:05.34).
- West Virginia (10/11-12): Placed third in the 200 fly (2:03.72).
- Princeton Invitational (12/6-8): Touched seventh in the 400 IM (4:25.39).
- Buffalo (1/10-11): Placed third in the 400 IM (4:30.66).
- Villanova (1/31): Finished third in the 200 fly (2:06.52).
2018-19 (Freshman Year)
- Big Ten Championships (2/20-23): Swam in the 200 fly (2:05.02), 200 IM (2:03.26) and 400 IM (4:35.00).
- George Washington (10/12): Placed second in the 200 free (1:52.49).
- Tennessee Invitational (11/29-12/02): Swam a season-best in the 400 IM (4:24.58).
- Bloomsburg (1/19): Won the 200 free (1:52.60).
- at Villanova (2/1): Placed third in the 200 fly (2:06.37) and fourth in the 500 free (5:09.90).
High School
- Attended Trinity High School in Camp Hill, Pennsylvania.
- Swam for York YMCA under head coach John Nelson.
- Placed sixth in the 200 IM at the 2018 YMCA Short Course National Championships.
- Helped team to 2017 Short Course YMCA National Championship.
- Member of 2017 Short Course YNats 800 and 400 free relay championship teams and 2017 Long Course YNats 800 Free Relay Champions.
- USA Swimming Scholastic All-America
- Member of National Honors Society, Foreign Language Honors Society and Math Honors Society.
Personal
- Full name is Marget Sophia Shelly.
- Born December 27, 1999 in Pittsburgh.
- Parents are Karen and Lucas Shelly, who both attended Penn State. Dad, Lucas, swam for Penn State.
- Has two younger brothers, Rece and Nick, and a younger sister, Natalie.
- Majoring in communication sciences and disorders.
- Hobbies include spending time with family and friends and reading.