Can i place my luggage somewhere in the stadium

For Raiders games, bag check is available for $10 at the North and South Entrances of Oracle Arena; they accept cash & credit cards. For A's games, the bag check is in a kiosk near D Gate (which might be cash only).

Off the plaza between the stadium and the arena there's a bag check next to the A's Ticket Services office.

Yeah u just have checked n

Yes they do it outside at the basketball one st the oracal and u grab it after i think is how it works hope thst helps