On Sept. 15, the Jackson Generals won the 2016 Southern League championship as a Mariners affiliate. Four days later, the affiliation ended.
On Monday, the Mariners signed a two-year PDC with the Texas League's Arkansas Travelers. The Travelers had spent the previous 16 seasons as an Angels affiliate, and during five of those seasons (2011-15) the Angels' general manager was Jerry Dipoto.
Dipoto assumed that same role with the Mariners prior to this season, which seems to have been a factor in the affiliation switch.
In a related move, Jackson signed a four year PDC with the Diamondbacks. This ended the D-backs 10-year affiliation with the Mobile BayBears, who summarily signed a two-year PDC with the only Major League organization left in the Double-A mix: the LA Angels.