David Percy Pagan [pay'-gun] (born September 15, 1949) is a Canadian former professional baseball pitcher.

After three seasons in their farm system, he received his first call up to the majors in 1973, making the start in the second game of a July 1 double header with the Cleveland Indians.

He was acquired along with Rick Dempsey, Scott McGregor, Tippy Martinez and Rudy May by the Baltimore Orioles from the Yankees for Ken Holtzman, Doyle Alexander, Elrod Hendricks, Grant Jackson and Jimmy Freeman in a blockbuster at the trade deadline on June 15, 1976.

[3] After going 1–4 with a 5.98 ERA the rest of the way for Baltimore, he was selected by the Seattle Mariners in the 1976 Major League Baseball expansion draft.

He was traded to the Pittsburgh Pirates for a player to be named later on July 27, 1977, and made one appearance with the club that September against the New York Mets.