Redshirted the 2007 season at Dixie State. After Dixie he transferred to Utah Valley University. He played high school baseball at Lone Peak High School. Leavitt also played golf in high school.

Son of Kelly and Jackie Leavitt, Kellen was born in Reno, Nevada. He plans to major in Business at UVU and graduated from Lone Peak HS in 2006 with a 3.75 GPA and was on the honor roll. Kellen served and French-speaking LDS Church mission from 2007-09 in Belgium and Netherlands, is an Eagle Scout, and enjoys the outdoors, hunting, fishing and reading. He married his wife Melissa in 2013.