He competed in the men's 4 × 200 metre freestyle relay event at the 2016 Summer Olympics.
Then in 2017, the NC State 800 freestyle relay squad won the national championship.
Held, Vazaios, Ress, and Dahl put up the fastest time in history setting both NCAA and U.S. open records.
[3] In 2018, Dahl was named as a recipient of the Atlantic Coast Conference Postgraduate Scholarship.
The scholarship is awarded to student-athletes that has performed with distinction in both the classroom and their respective sport, while demonstrating exemplary conduct in the community.