Billie Joe Armstrong supports A's fans' successful reverse boycott party.

Green Day frontman Billie Joe Armstrong showed his support for A's fans protesting against the proposed move to Las Vegas by attending the game and posing for pictures with fans. The fans held a reverse boycott and chanted "Stay in Oakland" and "Sell the team" throughout the night. The A's had their largest crowd of the season, but the festivities took a small turn when fans littered the field with trash after the final out was recorded. The Nevada State Senate passed a bill that would provide public funding for the A's planned stadium in Vegas, and the boycott proved more poignant.