DETROIT— Before each season, Tony Finau writes down his goals. Entering 2021-22, Finau had two that stood out — win multiple events and capture the FedExCup championship. One of those was checked off Sunday at the Detroit Golf Club, and the second suddenly seems much more attainable than it did a few weeks ago. Finau, the 16th-ranked player in the world entering the week, fired a 5-under 67 to win the Rocket Mortgage Classic at 26 under, a record winning score in the fourth playing of the tournament. It was his second straight victory after winning last week’s 3M Open near Minneapolis, and wit…