| Team | Owner | Slack | Championships |
| Arizona Diamondbacks | Alex Baxter | dbaxter | 1985 NL Pennant, 1987 Champion |
| Baltimore Orioles | Andre Ivarsson | Buck Showalter | |
| Boston Red Sox | Doug Morton | Doug – BoSox | |
| Chicago Cubs | Matt Ida | Ida | 1980 Champion, 1983 Champion, 1988 Champion, 1989 NL Pennant |
| Chicago White Sox | Cory Einhorn | Cory | 1981, 1982, 1986 NL Pennant Pittsburgh Pirates through 1989 |
| Cleveland Guardians | Kevin Conway | Cleveland-Kevin | |
| Colorado Rockies | Ben Thompson | Ben- Go Rockies | 1984 NL Pennant |
| Detroit Tigers | Jason K. | Jason Tigers GM | |
| Houston Astros | Claybor Finley | Claybor | |
| Miami Marlins | Augustin | Augustin | Kansas City Royals through 1989 |
| Milwaukee Brewers | Michael Ejercito | Michael Ejercito | 1982 Champion, 1983 AL Pennant, 1987 AL Pennant |
| Minnesota Twins | Dan Hornbaker | Dan (Twins) | 1989 Champion, 1990 Champion |
| Montreal Expos | Dave Galindo | Dave Galindo | |
| New York Yankees | Brian Boyd | Boyd – Yankees | |
| New York Mets | Jamie D’Agostini | jamie dags | |
| Philadelphia Phillies | Jason Spiegel | Spiegs | |
| San Francisco Giants | Jake Fegan | Jake Fegan | Louisville Colonels through 1983 |
| St. Louis Cardinals | Kevin Smith | Kevin – Cardinals | |
| Seattle Mariners | Tyler Jorgensen | Tyler-Mariners | Toronto Blue Jays through 1983 |
| Texas Rangers | Kyle Shea | Texas Rangers |