Yestino - The Signal ยท Mackenzie O'Brienhttps://yestino.com/entities/mackenzie-o-brien-d5525dEvery event involving Mackenzie O'BrienenRecord-setting Williamston swimmer Mackenzie O'Brien pushing for state titlehttps://yestino.com/events/record-setting-williamston-swimmer-mackenzie-o-brien-pushing-3c4837https://yestino.com/events/record-setting-williamston-swimmer-mackenzie-o-brien-pushing-3c4837Thu, 01 Oct 2026 19:00:53 GMTLSJ girls athlete of week winner Mackenzie O'Brien recently set pool records at Haslett and Williamston. Sources: Yahoo Sports