Raymond John Giannelli (born February 5, 1966 in Brooklyn, NY) is an American former professional baseball third baseman. He played in Major League Baseball (MLB) for the Toronto Blue Jays during the 1991 season and for the St. Louis Cardinals in 1995.

Ray Giannelli attended New York Institute of Technology, where he was the school's all-time leader with 179 runs scored, and was selected by the Toronto Blue Jays in the 38th round of the 1988 amateur draft. He made his pro debut that summer with the Medicine Hat Blue Jays, hitting .244 with 4 home runs in 47 games. He hit 18 homers for the Myrtle Beach Blue Jays in 1989 and then matched that tally with the Dunedin Blue Jays the following year, 1990. He reached the majors with the Jays in May 1991, hitting .167 while appearing in 9 games at third base. After playing with the Syracuse Chiefs from 1992 to 1994, he became a free agent.

Giannelli signed with the St. Louis Cardinals and spent much of the 1995 season with the Louisville Redbirds, hitting .295 with 16 home runs. This performance earned him a late-season call-up to the majors, but he struggled at the plate, going 1-for-11 in 9 games. He later played in the Minnesota Twins and Colorado Rockies organizations before second stints in the Cardinals and Blue Jays chains.

Following his playing days, Giannelli spent nearly a decade as hitting coach at his alma matter, NYIT. He returned to the school as an assistant coach in 2019.

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)