Roy Allen Thomas (March 24, 1874 – November 20, 1959) was a center fielder in Major League Baseball.

According to baseball analyst Bill James, Thomas is the only major league regular to have scored three times as many runs as he drove in.

His relentless patience at the plate infuriated opposing pitchers(At one point, even being punched by Bill Phillips) and prompted the NL to change its rule regarding foul balls in 1901.

He is, in fact, reported by James to hold the unofficial consecutive foul-ball record – 22, in one plate appearance.

[1] Thomas batted .325 in his rookie year with a .457 OBP via 115 walks, immediately establishing himself as the Philadelphia Phillies' leadoff hitter and center fielder.