Complex sentence: Yost became the longest-tenured manager in Royals history, and became the winningest manager in club history after a 3-2 win over the Milwaukee Brewers on June 18,2015.
Split into simpler sentences: Yost became the longest-tenured manager in Royals history. He became the winningest manager in club history after a 3-2 win over the Milwaukee Brewers on June 18,2015.