Construction on Arrowhead Stadium was completed in time for the 1972 season.
On August 12, 1972, the Chiefs defeated the St. Louis Cardinals 24–14 in the first preseason game at Arrowhead Stadium.
Later on during the 1972 regular season, the largest crowd to see a game in Arrowhead Stadium was 82,094 in a Chiefs game against the Oakland Raiders on November 5 (Kansas City won 27-14 for its first regular season victory in the stadium).

In 1973, the stadium was the first in the NFL to include arrows on the yard markers to indicate the nearer goal line (initially, they resembled little Indian arrowheads).
This practice would eventually spread to the other NFL stadiums as the 1970s progressed, finally becoming mandatory league-wide in the 1978 season (after being used in Super Bowl XII), and become almost near-universal at the lower levels of football.

On January 20, 1974, Arrowhead Stadium hosted the Pro Bowl.
Due to an ice storm and brutally cold temperatures the week leading up to the game, the game's participants worked out at the facilities of the San Diego Chargers.
On game day, the temperature soared to 41 °F (23 °C), melting most of the ice and snow that accumulated during the week.
The AFC defeated the NFC, 15–13.
Construction on Arrowhead Stadium was completed in time for the 1972 season. On August 12, 1972, the Chiefs defeated the St. Louis Cardinals 24–14 in the first preseason game at Arrowhead Stadium. Later on during the 1972 regular season, the largest crowd to see a game in Arrowhead Stadium was 82,094 in a Chiefs game against the Oakland Raiders on November 5 (Kansas City won 27-14 for its first regular season victory in the stadium). 
In 1973, the stadium was the first in the NFL to include arrows on the yard markers to indicate the nearer goal line (initially, they resembled little Indian arrowheads). This practice would eventually spread to the other NFL stadiums as the 1970s progressed, finally becoming mandatory league-wide in the 1978 season (after being used in Super Bowl XII), and become almost near-universal at the lower levels of football.
On January 20, 1974, Arrowhead Stadium hosted the Pro Bowl. Due to an ice storm and brutally cold temperatures the week leading up to the game, the game's participants worked out at the facilities of the San Diego Chargers. On game day, the temperature soared to 41 °F (23 °C), melting most of the ice and snow that accumulated during the week. The AFC defeated the NFC, 15–13.
Arrowhead Stadium