 He also spent the next four years in the Texas farm system as pitching coach with the AA Tulsa Drillers (1988–90) and the Triple-A Oklahoma RedHawks (1991).Jeff spent six years in the Seattle Mariners organization as Pitching Coach with the AA Jacksonville Suns (1992–94) and the AAA Tacoma Rainiers (1995–97).In that time, he worked with future major leaguers such as Derek Lowe and Mike Hampton.