Michael Cassidy is a Guamanian spearfisher.

At the 2014 and 2018 Micronesian Games, he won gold medals as part of the team events, the latter of which he won as a safety diver.

[1][2] He also came fourth in the individual spearfishing event at the 2018 games.

[3] As a member of the Marianas Yacht Club, he stated in April 2023 that he is working on developing a youth sailing program in Guam that can compete at the 2027 Pacific Games and has applied for the Guam Sailing Federation to be re-added to the Guam National Olympic Committee.

This biographical article relating to sports in Guam is a stub.