Spencer Dutton is not John Dutton’s dad. The television series “Yellowstone,” which features the Dutton family, has not made any reference to a character named Spencer Dutton. In addition, there is no information in any official sources or fan theories that suggest Spencer Dutton is related to the Dutton family in any way.

John Dutton is the patriarch of the Dutton family and the owner of the Yellowstone Ranch, a fictional cattle ranch in Montana. He is portrayed by actor Kevin Costner in the series. Throughout the show, it is revealed that John has four children: Jamie, Beth, Kayce, and Lee. John’s wife, Evelyn, died in a horse-riding accident, which is a significant plot point throughout the series.
John’s family history is explored in the show, and it is revealed that his father was a rodeo cowboy and his mother was a waitress. John grew up on the ranch and inherited it from his father, who had purchased it when it was a small plot of land. Over the years, John has expanded the ranch and built it into a successful enterprise, but his family is constantly under threat from various outside forces.
The show’s plot centers on the Dutton family’s struggles to protect their land and legacy from developers, politicians, and other rivals. As the series progresses, viewers are introduced to new characters and plotlines that add depth and complexity to the story.
In conclusion, there is no evidence to suggest that Spencer Dutton is related to the Dutton family, let alone John Dutton’s father. While the show explores the Dutton family’s history and relationships, there is no mention of any character named Spencer Dutton. As such, it is safe to assume that Spencer Dutton is not related to the Dutton family in any way.