Contreras went 3-for-5 with a double and run scored for Triple-A Iowa on Saturday.
Contreras is still looking for his first home run of the season, but he's slashing .429/.474/.543 in 35 at-bats for Iowa. He's one of the best prospects in the Cubs' system, and with Kyle Schwarber (knee) out for the year, there's a possibility he'll catch a few games in the majors this summer.