In 1984, he became the head coach of the amateur F.C. Seattle for the F.C. Seattle Challenge '84, a series of exhibition games against NASL and national teams. He returned to F.C. Seattle, now known as the F.C. Seattle Storm for the 1988 Western Soccer League season, replacing Scotsman Jimmy Gabriel. That year, Seattle ran away with the league championship, defeating the San Jose Earthquakes 5–0. While Jenkins returned for the 1989 season, it did not go as well and he resigned at the end of the season to be replaced by Stuart Lee.