The club recalled right-hander Joe Martinez and lefty Mike Zagurski from Triple-A Reno, while optioning Paterson and designating for assignment reliever Jonathan Albaladejo, who was just called up Saturday.
"We needed length for [Tuesday]," manager Kirk Gibson said. "If we get in a situation where we have to take Josh [Collmenter] out early, we would totally blow our whole bullpen up, and we want to stay away from that. That's why those moves were made."
Martinez gave up nine earned runs in 18 1/3 innings while striking out eight in three starts for Reno. In 18 career Major League appearances, Martinez has thrown 49 2/3 innings with a 6.16 ERA in stints for the Giants and Pirates.
"Anytime you can be seen at this level is a chance to make an impression," Martinez said. "Sometimes you get a little more excited. You just hope once you go out on the mound it goes into game mode. It's the same game, just a bigger stage and higher consequences. You try to relax and get the job done."
Zagurski allowed two earned runs in nine innings while striking out seven in six Triple-A relief outings this season. He was originally drafted by the Phillies -- the D-backs' opponent Tuesday and Wednesday -- and had a 6.82 ERA over 31 2/3 career innings with the club from 2007-11.
"It's great, I have a lot of friends on that team," Zagurski said. "I know those guys very well. It's nice to get back and play against them. They are like anybody else though -- I have to try to get them out and they have to get a hit. It shouldn't be too different."
Albaladejo only made one appearance for the D-backs, throwing a scoreless innings Monday. Paterson has struggled throughout the young season, allowing 11 earned runs over 2 2/3 innings. On Monday, he faced five Phillies in the ninth inning and gave up five earned runs on five hits, including two home runs.
"He's not throwing the ball well," Gibson said. "We need to try to get him back on track, and we felt the best way to do that was to send him to Triple-A. He needs to work and get some confidence back. He'll be on more of a regular schedule down there."