The case for the A's dealing Brent Rooker at the trade deadline

There is no question that Brent Rooker has the makings of a foundational piece for the A's. He's been one of the best hitters in baseball over the last two seasons. For those reasons, then, the question becomes whether Rooker remains with the green and gold when they leave for Sacramento. With the July 30 trade deadline looming, the A's have a decision to make. Do they keep Rooker to complement the team's young core?