He is three years younger than Dawn. Jeff's favorite sport is soccer and he loves to make people laugh. He moved with his mom and sister to Stoneybrook when he was ten, but did not adjust to the move well. He got into trouble in school a lot and got into a few fights because he missed his dad. He finally chose to move back to California with his father. He wants to be a comedian when he is older.
In Stoneybrook, his best friends are the Pike triplets, which are in a family of eight kids. His room tends to be on the messy side, or as he prefers to put it: organized chaos.
His best friend in California is Rob, whom has has known since he was three years old. His other best friend in California is Mark.
He loves his family. He often teases and argues with Dawn, but always get along. Jeff, unlike Dawn, was quick to accept Carol as his stepmother, but hates her sense of style. He loves his baby sister, Gracie, and helped name her.
He is the only Schafer who loves junk food. The other family members are health food nuts. He convinced his parents on Halloween to sell candy instead of apples and raisins. He loves chocolate cake.
He loves Disneyland, and his favorite place to go is Frontierland.
He likes the Schafers' housekeeper, Mrs. Bruen, and was worried about her losing her job when his dad, Jack, married his new wife Carol. However, since Carol is also very messy, Mrs. Bruen now had more work to do!