Besides coaching first base, Perry Hill is the Mariners infield coach as well. He has been coaching for 33 years with 24 years in the major leagues. Prior to coaching, he played shortstop in the Gulf States League in 1976 and then five years in the Mexico Sonora League. He went into coaching after that.
Hill has had three different teams in the major leagues lead in fielding percentage with the latest one being the Miami Marlins in 2017. One of his players on the teams was Dee Gordon. I am sure Gordon is one of the reasons that Hill is now with the Mariners.