After Ashby was lost for a month of the season with a viral infection in his ear, Mizerock was called back up. However, he only appeared in four games during that span, and was optioned back down to the triple A Tucson Toros upon Ashby's return. He was brought back up for a third time in mid-August, and remained on the major league roster through the end of the season. He had a second game with Niekro on the mound on August 31 in which he had two passed balls. In all, Mizerock had eleven passed balls for the season; eight of which occurred with Niekro pitching.