I believe it's because the original team of AA Baltimore Orioles
dropped out of the AA after the 1889 season.

In the 1890 season, when the Brooklyn Gladiators folded in August,
the Baltimore team playing in the Atlantic Association took their
place in the AA for the remainder of the 1890 season as the "new"
Baltimore Orioles. This team then later transferred to the NL.

THANKS,
Kevin Johnson


--- In baseball-databank@yahoogroups.com, "wknight94"
<wknight94@y...> wrote:
>
> Why do the 1890 and 1891 A.A. Baltimore Orioles have a different
> teamID (BL3) than the A.A. Baltimore Orioles from 1882 to 1889
(BL2)?
>
>
> select name, teamid, lgid, yearid from teams where franchid = "BLO"
>
> +-------------------+--------+------+--------+
> | name | teamid | lgid | yearid |
> +-------------------+--------+------+--------+
> | Baltimore Orioles | BL2 | AA | 1882 |
> | Baltimore Orioles | BL2 | AA | 1883 |
> | Baltimore Orioles | BL2 | AA | 1884 |
> | Baltimore Orioles | BL2 | AA | 1885 |
> | Baltimore Orioles | BL2 | AA | 1886 |
> | Baltimore Orioles | BL2 | AA | 1887 |
> | Baltimore Orioles | BL2 | AA | 1888 |
> | Baltimore Orioles | BL2 | AA | 1889 |
> | Baltimore Orioles | BL3 | AA | 1890 |
> | Baltimore Orioles | BL3 | AA | 1891 |
> +-------------------+--------+------+--------+
>
> Thanks.
>
> Bill Knight