Why PGA Tour rookie Jackson Koivun made the U.S. Presidents Cup selections a bit more difficult

PGA Tour rookie Jackson Koivun claimed his first PGA Tour victory at the 3M Open in just his third professional start, defeating world No. 1 in the process. The win by the young rookie has complicated the U.S. Presidents Cup team selections, as his sudden rise demands consideration for a spot on the squad. Koivun's early breakthrough performance marks one of the most impressive debuts in recent PGA Tour history.