Bob Grottkau

Robert Fred Grottkau (born March 22, 1937) is a former American football guard in the National Football League (NFL) for the Detroit Lions and Dallas Cowboys. He played college football at the University of Oregon.

Early life
Grottkau attended Oakland High School where he played as a fullback. He accepted a scholarship from the University of Oregon. As a sophomore, he was switched to offensive tackle. The next year, he was moved to guard out of necessity and became a two-year starter.

Detroit Lions
He was selected by the Detroit Lions in the fourth round (46th overall) of the 1959 NFL Draft. In 1960, he played only 5 games.

On August 21, 1961, he was traded along with rookie Houston Entwine to the Dallas Cowboys in exchange for offensive lineman John Gonzaga.

Dallas Cowboys
In 1961, he was a reserve player. On July 31, 1962, he was waived after being unable to overcome a knee injury.

Personal life
Grottkau was the offensive line coach at San Jose State University for two years. In 1971, he was named the offensive coordinator and line coach for the University of Iowa.