The Diamondbacks have designated right-handers Junior Guerra and Joel Payamps for assignment. They added righty J.B. Bukauskas, Luis Frias and Matt Peacock, outfielder Stuart Fairchild and infielder Geraldo Perdomo to their 40-man roster.
The 35-year-old Guerra joined the Diamondbacks on a one-year guarantee worth $2.65MM last offseason. He wound up posting 23 2/3 innings of 3.04 ERA/4.12 FIP ball with a 50.8 percent groundball rate, but with just 7.99 K/9 against 5.7 BB/9, the Diamondbacks decided to move on from Guerra.
