Conversation so far:
what team was Kurt Warner in, in 2009?
Kurt Warner announced his desire to return to the Cardinals for the 2009 season.
what were Kurt Warner's stats in the 2009 season?
Kurt Warner broke the NFL's single-game record for completion percentage in the regular season, completing 24 of 26 passing for 243 yards and two touchdowns.
what game was the two touchdowns when Warner broke the NFL's single-game record for completion percentage in the regular season?
Kurt Warner broke the NFL's single-game record for completion percentage in the regular season on September 20, 2009

Question: what team did he play against that day?
Self-contained rewrite: what team did Kurt Warner play against on September 20, 2009?