| Player | Team | Date | Inn. | Count | Type | Dist. (ft.) | Field | Opponent | Home/Away | Pitcher | Outcome |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Harold Baines | Orioles | May 04, 1999 | 10 | 2-2 | Grand slam | 419 | Center | Chicago White Sox | Home | David Lundquist | Win |
| Brady Anderson | Orioles | May 27, 1999 | 7 | 0-1 | Grand slam | 365 | Right | Los Angeles Angels | Away | Mike Magnante | Win |
| Harold Baines | Orioles | Jul 04, 1999 | 7 | 1-0 | Grand slam | 384 | Right | New York Yankees | Away | Ramiro Mendoza | Win |
| Jason Giambi | Opponent | Apr 25, 1999 | 2 | 2-0 | Grand slam | N/A | Right | Oakland Athletics | Home | Ricky Bones | Loss |
| Roberto Kelly | Opponent | May 13, 1999 | 4 | 0-1 | Grand slam | N/A | N/A | Texas Rangers | Away | Scott Kamieniecki | Loss |
| Paul Konerko | Opponent | Jun 17, 1999 | 7 | 2-0 | Grand slam | N/A | Left | Chicago White Sox | Away | Jesse Orosco | Loss |
| Alex Rodriguez | Opponent | Jul 30, 1999 | 5 | 2-1 | Grand slam | N/A | Left | Seattle Mariners | Away | Arthur Rhodes | Loss |
| Jim Thome | Opponent | Aug 14, 1999 | 1 | 0-0 | Grand slam | N/A | Left | Cleveland Indians | Away | Jason Johnson | Loss |
| Damon Buford | Opponent | Oct 02, 1999 | 9 | 3-2 | Grand slam | N/A | Left | Boston Red Sox | Home | Gabe Molina | Loss |
| Brady Anderson | Orioles | Apr 05, 1999 | 3 | 3-2 | Solo | 368 | Right | Tampa Bay Rays | Home | Wilson Alvarez | Win |
| Willis Otanez | Orioles | Apr 07, 1999 | 6 | 1-2 | Solo | 373 | Left | Tampa Bay Rays | Away | Tony Saunders | Loss |
| Will Clark | Orioles | Apr 07, 1999 | 7 | 3-1 | Solo | 395 | Right-center | Tampa Bay Rays | Away | Albie Lopez | Loss |
| Will Clark | Orioles | Apr 11, 1999 | 9 | 3-2 | Solo | 378 | Left-center | Toronto Blue Jays | Home | Tom Davey | Loss |
| Will Clark | Orioles | Apr 15, 1999 | 4 | 1-0 | Solo | 400 | Right-center | New York Yankees | Away | Roger Clemens | Win |
| Albert Belle | Orioles | Apr 15, 1999 | 4 | 0-1 | Solo | 335 | Right | New York Yankees | Away | Roger Clemens | Win |
| Brady Anderson | Orioles | Apr 16, 1999 | 1 | 0-1 | Solo | 382 | Right | Toronto Blue Jays | Away | Pat Hentgen | Loss |
| B.J. Surhoff | Orioles | Apr 16, 1999 | 4 | 0-2 | Solo | 362 | Right | Toronto Blue Jays | Away | Pat Hentgen | Loss |
| Albert Belle | Orioles | Apr 25, 1999 | 4 | 1-1 | Solo | 432 | Center | Oakland Athletics | Home | Kenny Rogers | Loss |
| Charles Johnson | Orioles | Apr 27, 1999 | 4 | 1-2 | Solo | 400 | Right-center | Kansas City Royals | Home | Kevin Appier | Win |
| Brady Anderson | Orioles | Apr 29, 1999 | 1 | 2-1 | Solo | 420 | Right | Kansas City Royals | Home | Jeff Suppan | Loss |
| Delino DeShields | Orioles | May 02, 1999 | 1 | 2-1 | Solo | 385 | Right-center | Minnesota Twins | Home | Eric Milton | Win |
| Albert Belle | Orioles | May 02, 1999 | 4 | 1-2 | Solo | 401 | Left-center | Minnesota Twins | Home | Eric Milton | Win |
| Jeff Conine | Orioles | May 04, 1999 | 4 | 0-0 | Solo | 411 | Left-center | Chicago White Sox | Home | Mike Sirotka | Win |
| Jeff Conine | Orioles | May 04, 1999 | 6 | 0-0 | Solo | 411 | Left-center | Chicago White Sox | Home | Mike Sirotka | Win |
| Brady Anderson | Orioles | May 05, 1999 | 7 | 3-2 | Solo | 394 | Right-center | Chicago White Sox | Home | Sean Lowe | Win |
