F-15: Players who qualified for the PGA Tour Champions season-ending 2025 Charles Schwab Cup Championship
F-16: Top 20 money leaders from 2026 PGA Tour Champions Charles Schwab Cup Money List as of March 23
F-19: Winners of PGA Tour Champions co-sponsored events whose victories are considered official from 2025 U.S. Senior Open to initiation of the 2026 U.S. Senior Open

The Australian native will make a second consecutive U.S. Senior Open start. Allan registered three of his five career professional victories in 2025 on the PGA Tour Champions: the Galleri Classic, Dick's Open and Boeing Classic. He also won the 2002 Holden Australian Open and the 1998 German Open, the latter coming on the European Tour (now DP World Tour). Allan was born in Australia three years after his parents emigrated to the country from Scotland.