Complex sentence: He retired after the 1973 season with 124 wins including 6 playoff wins, which was later surpassed by Fran Tarkenton with 130 (6 playoff) in 1978.
Split into simpler sentences: He retired after the 1973 season with 124 wins including six playoff wins. This was later surpassed by Fran Tarkenton with 130 wins (six playoff) in 1978.