Brohm played basketball and baseball for the Shamrocks, helping the basketball team to its first ever Regional title and the baseball team to a state runner-up finish. He was the MVP of the only State tournament victory in Trinity history, when they defeated University Heights Academy in 2004. Brohm was also voted the MVP of his baseball team his senior year. Following his senior year he was drafted by the Colorado Rockies in the 49th round of the 2004 MLB Draft.