2014: The Hounds selected Dionne in the second round (13th overall) of the 2014 MLL Collegiate Draft. However, the attackman remained on the collegiate inactive roster through the end of the season.
Collegiate: Dionne helped lead Duke to consecutive NCAA Championships in 2013 and 2014. He finished his collegiate career with 140 goals and 22 assists. His goal total ranks eighth in Duke scoring history, while his 162 points were 20th at the time of graduation. Dionne was a 2014 honorable mention USILA All-American.