Following the 2017 season, Grizzlies manager Tony DeFrancesco announced he would not return to the Houston Astros organization for the 2018 season. DeFrancesco led Fresno to a winning record in each of his three seasons at the helm, his clubs compiling a record of 234–194 (.547) from 2015 to 2017. The run marked the first time in franchise history (since 1998) the Grizzlies completed three consecutive winning seasons.
