McGowan also serves as chief executive officer of Vulcan Sports & Entertainment. Seattle-based Vulcan Inc. is the privately held company founded by the late Paul Allen.
McGowan’s resignation comes amid an outside investigation into workplace concerns surrounding the organization.
Both The Athletic and Yahoo Sports have reported the probe stemmed from allegations of workplace misconduct involving Neil Olshey, the team’s president of basketball operations and general manager for the organization.
The Blazers confirmed the investigation in a statement Saturday. It did not name Olshey.
“The Portland Trail Blazers organization was recently notified of concerns around workplace environment by non-player personnel at the practice facility. In response, we immediately engaged O’Melveny & Myers, an outside firm with significant expertise in this area, to conduct a full, fair and independent review into these concerns and will take appropriate action based on its outcome,” the statement said.
Olshey has been general manager of the Blazers since 2012.
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