A mechanic who works at the garage with his friend Dan, Fred is introduced to Dan's sister-in-law Jackie Harris, leading to a one-night stand, accidental impregnation, and marriage. It takes a lot of encouragement for Jackie to eventually warm up and face the fact that Fred is the father of her child, Andy, and therefore a part of their life (in the beginning, Jackie is still healing from her trauma with Fisher and is fearful of getting too close to another man). Fred at first assumes that Jackie's just putting him off lightly and initially doesn't understand that Jackie has been through a very traumatic experience that is not easily healed in addition to her dysfunctional childhood. Jackie eventually discovers that Fred is a "genuinely" nice guy and a good father, and by the time Andy is born he is good friends with both Roseanne and Dan.
Fred, being very conventional, is shocked by the Conners and Harrises' unconventional ways and cannot understand the whole subculture of Jackie's family. These two aspects, and his having very few of the same interests as Jackie, lead to the dissolution of his marriage to Jackie. Despite their attempts to make their marriage work, Jackie and Fred break up when they discover how incompatible they are.