Conversation so far:
When did Johnny Unitas start playing with the Baltimore Colts
In 1956, Johnny Unitas joined the Baltimore Colts.
What position did Johnny Unitas play for the Baltimore Colts?
Johnny Unitas was a quarterback.
How did the 1956 season fare for Johnny Unitas playing for the Baltimore Colts?
Johnny Unitas threw nine touchdown passes that year, including one in the season finale that started his record 47-game streak. His 55.6-percent completion mark was a rookie record.
How did Johnny Unitas do the following 1957 season?
In 1957, Johnny Unitas's first season as the Colts full-time starter at quarterback, Unitas finished first in the NFL in passing yards and touchdown passes.

Question: What else happened in the 1957 season?
Self-contained rewrite: What else happened with Johnny Unitas in the following 1957 season besides being first in the NFL in passing yards?