Carlos Rosa, 25, has a combined 2-1 record and 2.76 ERA with 14 strikeouts in 16.1 innings during nine games this season for Reno and Triple-A Omaha. He was acquired in a trade from the Kansas City Royals for minor league infielder Rey Navarro on May 1. Since joining the Aces, Rosa has allowed four hits while walking two and striking out four over 4.0 innings in three games. Rosa, who will wear No. 49, has posted a combined 0-0 record with a 3.21 ERA over 9 games out of the bullpen for the Royals in 2008 and 2009.
Daniel Stange, 24, posted a 13.50 ERA (6 ER in 4.0 IP) and .250 opponents average (4-for-16) with six walks and two strikeouts in four games for the D-backs after being recalled on April 28.