The move comes two days after Frieri allowed four runs and three hits while failing to protect a lead for the Angels in a loss at Washington. It was his second blown save this season in four chances.
Frieri is 0-2 with a 9.35 ERA in 10 appearances this year. He's allowed five home runs.
Smith is 1-0 with a 3.60 ERA, but 10 of his 11 appearances have been scoreless. He has three career saves.