Dennis Bryan Cook (born October 4, 1962) is an American former professional baseball pitcher who played in Major League Baseball (MLB) with the San Francisco Giants (1988–1989), Philadelphia Phillies (1989–1990, 2001), Los Angeles Dodgers (1990–1991), Cleveland Indians (1992–1993, 1995), Chicago White Sox (1994), Texas Rangers (1995–1996), Florida Marlins (1997), New York Mets (1998–2001), and Anaheim Angels (2002).

In college, Cook was named to the All-Southwest Conference team as an outfielder at the University of Texas in both 1984 and 1985.

Although not on the postseason roster, Cook was a member of the 2002 Angels team that won the World Series, defeating the Giants.

This once led Cook to stand on the mound and scream at Corrales in the first base coach's box during a 1997 Braves–Marlins game.

[4] In 2018, Cook became the pitching coach for the Chatham Anglers of the Cape Cod Baseball League.