Mike MacDonald (born November 27, 1980, in Berkeley, California, United States) is a retired rugby union footballer who previously played for Leeds Carnegie in the RFU Championship and English Premiership.
MacDonald played a pivotal role for Leeds during the 2006-07 season, contributing to their success in winning National League 1 and securing promotion to the Premiership.
At the 2011 Rugby World Cup, MacDonald broke two US records: he tallied his 63rd cap, surpassing Luke Gross as the United States' most-capped player,[9] and made his 11th appearance in a Rugby World Cup match, breaking the record held by Alec Parker.
[11] MacDonald was signed on as an assistant coach of the California Golden Bears rugby team in 2011.
[12] Since his joining of the team as the forwards coach in the 2011–12 season, Cal Rugby has made seven 15's national championship appearances, including two victories in 2016 and 2017.