Gregory Scott Booker (June 22, 1960 – March 30, 2019) was a professional baseball pitcher. He pitched in all or part of eight seasons in Major League Baseball, from 1983 until 1990. Booker's best season was probably in 1987. He made 44 appearances (all in relief) posting a very respectable 3.16 ERA, won 1 game and picked up his only career save on May 10, 1987 against the Cubs. Amazingly, it came in a game that the Padres won by the lopsided score of 14-2. Booker pitched the final 3 innings to preserve the win for starting pitcher Ed Whitson. He also served as a coach for the San Diego Padres from 1997 until 2003, the first four years as bullpen coach, then a season-plus as pitching coach. He was a scout for the Los Angeles Dodgers.