| Player | Team | Date | Inn. | Count | Type | Dist. (ft.) | Field | Opponent | Home/Away | Pitcher | Outcome |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Brian Roberts | Orioles | May 22, 2003 | 9 | 3-2 | Grand slam | N/A | Right | Los Angeles Angels | Away | Troy Percival | Win |
| Brian Roberts | Orioles | May 28, 2003 | 2 | 2-0 | Grand slam | N/A | Right | Los Angeles Angels | Home | Ramon Ortiz | Win |
| Jay Gibbons | Orioles | Jun 13, 2003 | 5 | 1-2 | Grand slam | N/A | Right | Milwaukee Brewers | Home | Jayson Durocher | Win |
| Tony Batista | Orioles | Jul 18, 2003 | 1 | 0-0 | Grand slam | N/A | Left | Los Angeles Angels | Home | Jarrod Washburn | Win |
| David Segui | Orioles | Jul 20, 2003 | 6 | 0-0 | Grand slam | N/A | Right | Los Angeles Angels | Home | Francisco Rodriguez | Win |
| Tony Batista | Orioles | Sep 24, 2003 | 1 | 0-0 | Grand slam | N/A | Left | Boston Red Sox | Away | John Burkett | Win |
| Mark Teixeira | Opponent | May 25, 2003 | 3 | 0-0 | Grand slam | N/A | Right | Texas Rangers | Away | Rick Helling | Win |
| Morgan Ensberg | Opponent | Jun 03, 2003 | 8 | 2-2 | Grand slam | N/A | Left | Houston Astros | Away | Kerry Ligtenberg | Loss |
| Scott Rolen | Opponent | Jun 08, 2003 | 6 | 0-0 | Grand slam | N/A | Left | St. Louis Cardinals | Away | Rick Bauer | Loss |
| Robert Fick | Opponent | Jun 20, 2003 | 4 | 0-0 | Grand slam | N/A | Right | Atlanta Braves | Away | Sidney Ponson | Loss |
| Eric Hinske | Opponent | Jul 04, 2003 | 6 | 0-1 | Grand slam | N/A | Right | Toronto Blue Jays | Home | Travis Driskill | Win |
| Tony Batista | Orioles | Apr 02, 2003 | 2 | 0-1 | Solo | 384 | Left-center | Cleveland Indians | Home | Ricardo Rodriguez | Loss |
| Deivi Cruz | Orioles | Apr 02, 2003 | 8 | 1-0 | Solo | N/A | Left | Cleveland Indians | Home | Jose Santiago | Loss |
| Jay Gibbons | Orioles | Apr 06, 2003 | 6 | 1-2 | Solo | N/A | Right | Boston Red Sox | Home | Tim Wakefield | Loss |
| Geronimo Gil | Orioles | Apr 08, 2003 | 10 | 0-0 | Solo | N/A | Left | Tampa Bay Rays | Away | Lance Carter | Loss |
| Jerry Hairston | Orioles | Apr 15, 2003 | 5 | 0-0 | Solo | N/A | Left-center | Cleveland Indians | Away | Jason Davis | Loss |
| Melvin Mora | Orioles | Apr 16, 2003 | 9 | 2-1 | Solo | N/A | Left | Cleveland Indians | Away | Danys Baez | Win |
| Jeff Conine | Orioles | Apr 17, 2003 | 2 | 1-0 | Solo | N/A | Left | Cleveland Indians | Away | CC Sabathia | Win |
| Tony Batista | Orioles | Apr 18, 2003 | 7 | 1-2 | Solo | N/A | Left-Center Field | Tampa Bay Rays | Home | Jesus Colome | Win |
| Jose Morban | Orioles | Apr 19, 2003 | 9 | 1-0 | Solo | N/A | Right | Tampa Bay Rays | Home | Alan Levine | Loss |
| Jay Gibbons | Orioles | Apr 22, 2003 | 9 | 1-0 | Solo | N/A | Left | Chicago White Sox | Home | Esteban Loaiza | Loss |
| Jay Gibbons | Orioles | Apr 23, 2003 | 6 | 1-2 | Solo | N/A | Right | Chicago White Sox | Home | Bartolo Colon | Win |
| Deivi Cruz | Orioles | Apr 24, 2003 | 7 | 1-1 | Solo | N/A | Left-center | Chicago White Sox | Home | Rick White | Win |
| Melvin Mora | Orioles | Apr 24, 2003 | 1 | 0-1 | Solo | N/A | Right-center | Chicago White Sox | Home | Josh Stewart | Win |
| Tony Batista | Orioles | Apr 26, 2003 | 6 | 2-0 | Solo | N/A | Left | Tampa Bay Rays | Away | Nick Bierbrodt | Loss |
