2013 (Freshman at Creighton)
- Brandon appeared in two games as a freshman.
- Mikulka drew a walk at Southeast Missouri State on March 12.
2012 (Freshman at Creighton)
- Brandon used his redshirt option during the 2012 season.
2008-11(Ponderosa High School)
- Played baseball for the Ponderosa Mustangs his sophomore through senior seasons, earning a varsity letter each season.
- Led his team to a Continental Conference championship his senior year, finishing 15-6 overall and 9-2 in conference play.
- Was named first-team all-conference and second-team All-State following his senior year.
- Made it to the state tournament, finishing fifth, after winning the Regional his junior season with an overall 18-7 record.
- Holds the record at Ponderosa High School for career home runs.
- Also lettered in football his senior season.
- Named to the honor roll every semester of high school.