Career Bests
| Event | Time | Date | Competition |
| 100 Breast | 56.03 | 3/05/21 | Big Ten Championships |
| 200 Breast | 2:03.65 | 1/23/21 | vs. Northwestern |
| 100 Fly | 50.09 | 3/04/21 | Big Ten Championship |
2021-22 (Junior Year)
- Ohio State: finished the 200 yard breast with a time of 2:09.23.
2020-21 (Sophomore Year)
- Big Ten Championships (3/1-3/6): Swam for two career-best times in the 100 breast (56.03) and 100 fly (50.09).
- Michigan State (2/5-2/6): Earned second in the 50 breast (25.86).
- vs. Northwestern and Iowa (1/22-1/23): Swam a personal-best in the 100 breast for a sixth-place finish (56.69). Member of the 200 medley relay team that swam for a fifth-place finish (1:30.47).
2019-20 (Freshman Year)
- vs. St. Bonaventure (10/4): Placed fourth in the 50 yard breast (27.89) and assisted in the 100 medley relay third place finish (43.85)
- Villanova (1/31): Earned two season-best times placing second in the 200 breast (2:07.34) and third in the 100 breast (58.57).
High School
- Swam four years at State College High School for coach Ryan Sprang
- Named 2017-2018 Team Captain
- Led team to four district championship titles, four conference championships and a fourth-place state title.
- Four-time state qualifier and a state finalist.
- School record holder in the 100 breast.
- Also swam for Gator Swim Club and Park Forest BullFrogs
- USA Junior Nationals A finalist
- Awarded the NISCA All-American and Scholastic All-American awards
Personal
- Full name is Michael John Challis
- Son of John Challis, a professor at Penn State, and Sue Challis, an instructor at Penn State
- Has a younger sister, Jodie
- Father, John, was a British University Champion in track & field and powerlifting for Loughborough University in England.
- Mother, Sue, was a trampoline national, European and World Champion Loughborough University in England.
- Enjoys playing chess and basketball
- Plans to major in economics
- Aspires to attend law school.
- Born January 7th, 2000 in State College, Pennsylvania
Why Penn State?
“I was born in State College, I have lived here my whole life, both my parents work here. For my whole life I have loved Penn State, and when I was little dreamed I might someday be good enough to swim here.”