 He was coached by his father, Gary Klatt, the head coach at Pomona High School in Arvada, Colorado.As a junior, he had 4 interceptions playing in the secondary, helping the team to a 9–3 record, and winning the Jefferson County league championship.As a senior at QB, he led the team to a 6–5 record and earned second-team all-state honors with a 78–125 passes (62.4%) for 1,250 yards and 16 touchdowns.