Matzek will likely miss out on a two-start week with Eddie Butler set to join the rotation Saturday against the Diamondbacks, MLB.com's Thomas Harding reports. Matzek, who will start Tuesday against the Dodgers, was set to take the hill for his second turn of the week on Sunday, but the addition of Butler will push everyone back a day. It's probably a blessing in disguise, as Matzek gets to bypass a start at Coors Field and instead make one next week at the more forgiving confines of Petco Park.