Complex sentence: The high point of Dickey's career came in the 1983 season when he powered the Packers offense to a then-team record 429 points, throwing for 4,458 yards, which was the third highest total in NFL history at the time.
Split into simpler sentences: The high point of Dickey's career came in 1983 when he powered the Packers' offense to a then-team record 429 points. He threw for 4,458 yards, which was the third-highest total in NFL history at the time.