Olt's demotion created a roster spot for Tsuyoshi Wada, a 33-year-old Japanese pitcher who will start for the Cubs on Wednesday. Wada allowed one run over five innings in his first career major league start on July 8. He's gone 10-6 with a 2.77 ERA in 18 starts for Iowa this season.
The Cubs also promoted a pair of prospects. Centerfielder Albert Almora will go from High-A Daytona to Double A Tennessee, and rightfielder Jorge Soler will go from Tennessee to Triple A Iowa. Almora batted .283 in 89 games with Daytona this season. Soler has battled injuries but batted .415 in 22 games at Double A this season.
- Dan Gartland