Michael Phelps Remembers Late Olympic Therapist Brian Campbell

• Michael Phelps mourns his massage therapist, Brian Campbell, who died at 68.
• Campbell served Team USA Swimming at multiple Olympic Games.
• Phelps shared fond memories and praised Campbell on social media.
• The cause of Campbell's death remains undisclosed.
• Campbell was admired for his positivity and sportsmanship.
• Colleagues and athletes paid tribute to Campbell's legacy.
• Campbell's work greatly enhanced athletes' performance and morale.