Rivas will start at first base and bat eighth in Sunday's game against the White Sox.

The 24-year-old Rivas was recalled from Triple-A Iowa before Saturday's game but did not appear in the contest. He'll now make his MLB debut Sunday after slashing .284/.405/.411 with four home runs, 32 RBI and 35 walks in 237 plate appearances for Iowa. Rivas will give the Cubs some depth at first base, though Frank Schwindel has emerged as the starter there in the wake of the Anthony Rizzo trade.

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