Alexander Mattison was born on June 19, 1998, to Mr. Darrell and Mrs. Pearl (nee Kilby) Mattison. Furthermore, he grew up in San Bernardino, California, with his two older twin brothers, Lamarr and Darrell Jr. Darrell Sr., Mattison’s father, is a retired United States Army officer who served in the air service branch.
His grandfather, James Mattison, and paternal uncle, Lawrence Mattison, were both veterans of the United States Armed Forces. Alexander went to San Bernardino High School for his education. From 2014 to 2015, he was a right-back for the San Bernandino Sun First Team.
Following high school graduation, Mattison enrolled as a student-athlete at Boise State University in 2016. In addition, he was a member of the Boise State Broncos football team. During his college years, he majored in Mass Communications.
