What happened: George Kirby and Randy Arozarena gifted players jerseys inspired by the Seattle Steelheads and Portland Rosebuds at an RBI event in East Anchorage, tying the gesture to Negro Leagues and early Pacific Northwest baseball history. Nine Mariners-affiliated RBI teams are competing in Portland this weekend for a chance to reach the MLB RBI World Series.

Why it matters: The gesture links current Mariners players to the franchise's youth development pipeline and to regional baseball history predating integration. A World Series berth would mark a season highlight for the RBI program's Mariners-affiliated teams.

What to watch: The nine RBI teams play in Portland this weekend with a World Series berth on the line.