PROVO, Utah — Shortly after sunset on Saturday, Rabbi Chaim Zippel clasped an overflowing cup of wine and a tin of smelling spices as he marked the end of the Sabbath with a small Jewish congregation at his home near Provo, which doubles as the county’s only synagogue.The conclusion of the ceremony known as Havdalah set off a mad dash to change into blue and white fan gear and drive to the football stadium at nearby Brigham Young University, the Utah private school run by The Church of Jesus Christ of Latter-day Saints. Zippel never expected to become a BYU fan, or even a football follower, but that changed when the school where 98.5% of students belong to the faith known widely as the Mormon church added its first Jewish quarterback to the roster. With Jake Retzlaff at the helm, the Cougars won nine straight games in what was shaping up to be a storied season before a loss Saturday against the Kansas Jayhawks ended their undefeated run. Even so, BYU — ranked No. 14 in the AP Top 25 — could end the season at the top of the Big 12 Conference with a chance to make the College Football Playoff.Retzlaff has earned a hero’s embrace by rabbis and others in Provo’s tiny but tight-knit Jewish community while also becoming a favorite of the broader BYU fan base that lovingly calls him the “BYJew.”One of just three Jewish students in a student body of 35,000, the quarterback and team co-captain who worked his way into the starting lineup has used his newfound stardom to teach others about his own faith while taking steps to learn more about Judaism for himself.“I came here thinking I might not fit in with the culture, so this will be a place where I can just focus on school and football,” Retzlaff told The Associated Press. “But I found that, in a way, I do fit. People are curious. And when everybody around you is so faith-oriented, it makes you want to explore your faith more.”The junior college transfer from Corona, California, formed a fast friendship with the Utah rabbi when he came to BYU in 2023. The two began studying Judaism fundamentals each week in the campus library, which would help Retzlaff speak confidently about his faith in public and in his many required religion classes. BYU undergraduates must take classes about the Book of Mormon, the gospel of Jesus Christ and the faith’s core belief that families can be together forever if marriages are performed in temples. Retzlaff said he was surprised to find many reference …