Mark J. Kellerman of Palos Heights passed away on July 22, 2025. Born May 24, 1956, in St. Louis, Missouri to George P. Kellerman and Agnes H. Kellerman, he was the youngest of three children and the only son. While his father was active in the Navy, Mark lived in Missouri, California, and lastly, Illinois. He was a 1974 graduate of Glenbrook South High School in Glenview, IL, where he was a member of the baseball team, cross country team, and covered sports for the school paper. He continued his education at Eastern Illinois University, where he earned a BA in Business with a minor in marketing, and was a pitcher on the Eastern Illinois Panthers baseball team. In 1979 Mark completed his MBA studies at Arizona State University.

He spent over 40 years as a medical sales representative, spending over 32 years working for Kimberly-Clark Professional Health Care. He was currently employed as a Clinical Product Specialist for the Halyard division of Owens & Minor.

Mark had a love for baseball. Although a loyal Chicago White Sox fan, he would attend the occasional Cubs game just for the opportunity to see professional baseball. For many years he played baseball in the local Roy Hobbs Over 30 Amateur Adult Baseball League. His love of running continued for many years, completing numerous 5k races and 9 half marathons.

Mark is survived by his wife, Sandra, daughter, Stacy Kellerman (fiancée, Nick Dowdal, children, Madeline and Nicholas), and son, Matthew Kellerman. He is survived by his grandson, Noah Colson, mother, Agnes Kellerman, and sisters, Patricia Allison and Sharon (Edward) Faltemier. Mark is survived by brothers-in law, Mark (Patricia) LaVelle and Raymond LaVelle, as well as sister-in-law, Shelly LaVelle (late Michael Johnson), along with many nieces, nephews, and cousins.

He was preceded in death by his father, George Kellerman.

Mark was deeply loved by his immediate and extended families, and he was devoted to them. He was immensely proud of his children and grandson. He loved family gatherings, reunions, and get-togethers, where he could talk to everyone, exchange stories, and learn something new. He was a compassionate and generous man who was always willing to help others, and was a friend to many.

Visitation Sunday, July 27, 2025 from 3:00 P.M. until 7:00 P.M.  Funeral Monday,  July 28th beginning with Chapel Prayers at 10:30 A.M. from the Becvar & Son Funeral Home,  5539 W. 127th Street, Crestwood, to Incarnation Catholic Church, 5757 W. 127th Street, Crestwood, for an 11:00 A.M. Mass.  Interment Holy Sepulchre Cemetery in Alsip. For more info: 708.824.9000 or www.becvarfuneralhome.com