The Libertyville (Ill.) forward was a high school all-state selection this past season and was the News-Sun Player of the Year. He was tied for the No. 2 scorer in the U.S. Youth Soccer 18U National League. He scored seven in the team's 11 goals en route to a 3-4 record and a fifth-place finish in the eight-team 18U Red Division.
Wittenbrink helped Libertyville to a high school state title in 2015, scoring a pair of goals in the championship victory over Quincy (Ill.). This past fall, Wittenbrink had 19 goals and 12 assists. Wittenbrink is a member of the TeamSnap Fall High School All-America Watch List. The TeamSnap All-America teams are not announced until the end of the school year.