Robert Vernon Walk (born November 26, 1956), nicknamed "The Whirly Bird", is an American former professional baseball pitcher who played in Major League Baseball (MLB) for the Philadelphia Phillies (1980), Atlanta Braves (1981–1983), and Pittsburgh Pirates (1984–1993).

In his waning years, Walk served as a spot starter and swingman for the Pirates' teams that won three straight NL East titles from 1990–1992.

His most memorable outing being when manager Jim Leyland removed him from the bullpen and named him a surprise starter in Game Five of the 1992 NLCS against Atlanta.

He was also the pitcher who was warming up in the bullpen when Francisco Cabrera hit the two-run, game-winning single against Stan Belinda, which won the series for Atlanta.

[2] When Walk was a teenager, he attended a game at Dodger Stadium and threw a tennis ball from the stands at Houston Astros centerfielder César Cedeño.