 Complete the following phrase:  After a down year in 1955 for the 49ers and for McElhenny, he had his most productive rushing season statistically in 1956, picking up 916 yards and eight touchdowns. He was invited to his third Pro Bowl. John Henry Johnson was traded prior to the 1957 season, which broke up the Million Dollar Backfield. Led by McElhenny and Tittle, the 49ers finished the 1957 regular season tied for the Western Conference title with the Detroit Lions. In the Western Conference tiebreaker, McElhenny carried 14 times for 82 yards and caught six passes for 96 yards and a touchdown, but the Lions won with a comeback victory to advance to the 