The city of Fond du Lac is mourning a sudden and heavy loss today. Jason Allen Tetzlaff, a man known for his kindness and his hard work, passed away unexpectedly on Saturday, May 9. The news has sent shockwaves through the local neighborhoods where Jason was a familiar and friendly face. At only thirty-seven years old, he left us far too soon, but he spent his final moments surrounded by the love of his life.
Jason’s story began right here in town back in September of 1988. He was a Fond du Lac kid through and through, raised by his mother, Lisa Mielke. He carried that local pride with him into adulthood, eventually starting a family of his own in the same community that raised him. In 2015, he married Katie, and those who knew them say they were a perfect match, creating a home that was always warm and welcoming.

If you asked Jason what he did for a living, he might tell you about his eight years at Mercury Marine. He was a dedicated employee who truly valued the relationships he built on the clock. He often spoke highly of his coworkers, treating them more like friends than just people he shared a shift with. His work ethic was strong, but everyone knew his heart was always back at home with his family.
Home was where Jason really shined. He was a father to Austin and Sawyer, and he took that job more seriously than anything else. He lived for the moments he got to spend with his boys, teaching them things and just being present. His kids were the light of his life, and he made sure they knew it every single day. He was a protector and a provider who always put his family’s needs above his own.
When he had a little bit of downtime, Jason knew how to relax. He was a big-time football fan and lived for the excitement of fantasy football season. He also loved getting lost in a good video game on his PS5. But his favorite way to spend a Saturday night was gathered around the table for a board game. Those family game nights were the highlight of his week and a tradition that his family will treasure forever.
The grief being felt by his loved ones is immense. Jason is survived by a large circle of family, including his wife, his two sons, his mother, and his sisters. While they are heartbroken, they are also reflecting on the joy he brought into their lives. He was a man who found happiness in the simple things, like a good game or a laugh with friends, and that’s the legacy he leaves behind.
Fond du Lac won’t be quite the same without Jason Tetzlaff. He was the kind of person who made the world a little brighter just by being in it. While his passing was sudden, the impact he made on his family and his colleagues will last for a lifetime. He showed everyone what it meant to be a devoted husband and a loving father, and he will be deeply missed by all who had the pleasure of knowing him.