Gregory Scott "Spike" Brummett (born April 20, 1967) is an American former right-handed Major League Baseball starting pitcher who played for the San Francisco Giants and Minnesota Twins in 1993.

Prior to playing professionally, Brummett attended Wichita State University.

In 1989, he tied for the Division I lead in wins with Kirk Dressendorfer and Scott Erickson.

Brummett split the 1992 season with the San Jose Giants and the Phoenix Firebirds.

On May 29, he made his major league debut, against the Atlanta Braves, pitching 62⁄3 innings, striking out three batters (all three were Ron Gant) and earning the win.

The Giants sent a player to be named later (Brummett), Aaron Fultz and minor leaguer Andres Duncan to the Twins for Jim Deshaies.