 Complete the following phrase:  Jurgensen was drafted in the fourth round of the 1957 NFL Draft by the Philadelphia Eagles. He was Philadelphias backup quarterback, behind Bobby Thomason in 1957 and Norm Van Brocklin, from 1958 through 1960. It was during this time as a backup that Jurgensen was a part of a championship team for the only time in his professional career, when the Eagles won the 