Cubs option Mike Olt to Triple-A
Olt had been with the Cubs since making the team out of spring training, but he struggled at the plate and struck out 84 times this season, including three Tuesday night against the San Diego Padres before he was demoted. He was hitting .139 with 12 home runs and never made enough contact to warrant staying in the big leagues.
Wada will make his second career start. He gave up no earned runs over five innings earlier this month against the Cincinnati Reds.