Golf club travel bags, as well as a lot of other sport/camping equipment, aren't held to the 62-inch rule. Southwest will hold you to the 50 pound rule for an industry-standard golf travel bag. I travel with a hard-side spinner Samsonite golf case frequently, 14 clubs and limited other stuff in the bag allows for a couple pairs of shoes, caps, etc to also be in the case, under 50 pounds.

https://www.southwest.com/help/bagga...K=SITESEARCH/0

Golf equipment.

Golf bag in hard golf bag carrying case provided by Passenger, including clubs, balls, and shoes. Hooded golf bags or golf bags in a soft-sided carrying case provided by the Passenger will be conditionally accepted. Overweight charges will apply to golf bags exceeding 50 pounds.

12 x 16 x 54 inches = 82 inches