VANCOUVER, British Columbia, Feb. 03, 2025 (GLOBE NEWSWIRE) -- MAG Silver Corp. (NYSE:MAG) ("MAG" or "MAG Silver") announces the appointment of John Armstrong to the Board of Directors, effective January 31, 2025, as part of MAG's planned Board refreshment. "We are very pleased to welcome John to our Board," said Peter Barnes, Chair of the Board. "With extensive leadership experience and a strong track record in capital markets, strategic planni…