 Wynegar was drafted by the Minnesota Twins in the second round of the 1974 Major League Baseball Draft.In his first season in professional baseball, he batted a league-leading .346 batting average and .464 on base percentage with a .524 slugging percentage and eight home runs and 51 RBIs (5th in the league) for the Rookie League Elizabethton Twins, and was named an Appalachian League All Star.In 1975, Wynegar played for the unaffiliated Reno Silver Sox of the California League, and batted .314 (4th in the league)/.473 (2nd in the league/.500 (4th in the league).