MESA, Ariz. (CBS) — The Cubs hosted the Oakland A’s in Mesa on Tuesday, and relied on the longball.

In the fourth inning, new Cubs left fielder Joc Pederson drilled a homer to center.

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Pederson was two for three. He also had an RBI double in the fifth.

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In the bottom of the seventh – the last inning – Rafael Ortega was the last batter. He cleared the bases with a walk-off grand slam.

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The Cubs beat the A’s 9-8.

CBS 2 Chicago Staff