Ronald Earl Willis (July 12, 1943 – November 21, 1977) was a professional baseball player.

He was a pitcher over parts of five seasons (1966–1970) with the St. Louis Cardinals, Houston Astros and San Diego Padres.

[1] For his career he compiled an 11–12 record with a 3.32 earned run average and 128 strikeouts in 188 appearances, all as a relief pitcher.

In 238.1 innings of work, he handled 80 chances (24 putouts, 56 assists) without an error for a perfect 1.000 fielding percentage.

Willis was born in Willisville, near Newbern, Tennessee, and later died in Memphis at the age of 34 from a brain tumor.