Column: Morikawa the latest case study in a bizarre collapse


              Jon Rahm, of Spain, celebrates his birdie putt with his caddie on the 18th green during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)
            
              Collin Morikawa watches his putt on the 18th green during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)
            
              Collin Morikawa plays his shot from the 13th tee during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)
            
              Collin Morikawa stands with his caddie on the 18th green during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)
            
              Jon Rahm, of Spain, celebrates his birdie putt on the 18th green during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)
            
              Collin Morikawa smiles after his shot from the 13th tee during the final round of the Tournament of Champions golf event, Sunday, Jan. 8, 2023, at Kapalua Plantation Course in Kapalua, Hawaii. (AP Photo/Matt York)