Parnell is currently on the 15-day DL with an elbow injury. He has thrown one inning so far this season, posting a 9.00 ERA with a walk and a strikeout.
In four innings of work, Frias was rocked for 10 earned runs in Sunday afternoon's 11-3 loss to the Padres. He was unable to strike out anybody and walked two batters.
Frias had been having a solid season until this game. In four previous starts and two relief appearances, Frias had only allowed a total of seven earned runs while striking out 19 batters. Twelve of San Diego's 20 hits came against Frias.
This disastrous game ballooned his ERA from 2.55 to 5.34 for the season.
Frias' next start is projected for Saturday against the Cardinals.
Ziegler made quick workof the first two hitters of the inning, needing just four pitches. After allowing a single to Starlin Castro, Ziegler finished things off by forcing Miguel Montero to pop out to left field. Ziegler now owns a 0.86 ERA in 21 innings of work.
Grilli struck out the first two batters he faced before issuing a walk, but he was able to strike out one more batter to slam the door on his team's win. He's rattled off three straight scoreless outings, but Sunday's three-strikeout game was his first since April 13. Grilli owns a 4.11 ERA and 23:7 K:BB ratio in 15 1/3 innings.
Storen entered the game in the ninth and struck out two batters. He did give up one double but was able to hold the runner. Storen now has an ERA of just 0.93 for the season.
This is Storen's third converted save opportunity in a row.
Following that outing, Stites will report to Class A Visalia to begin a minor-league rehab assignment.
Stites is on the disabled list due to an elbow injury.
A year ago, Stites posted a 5.73 ERA with 26 strikeouts in 33 innings. He's yet to appear in a game for the Diamondbacks this season.
Baez sustained a right pectoral strain and was placed on the 15-day disabled list. With the pain alleviated, Baez is expected to begin a throwing program soon.
Baez was forced to leave a May 13 game against the Marlins due to the injury.
In a corresponding move, the Giants designated infielder Casey McGehee for assignment.
Strickland, a prospect at closer, has posted a 1.66 ERA in 15 appearances with Triple-A Sacramento this season. He has five saves in 21 2/3 innings pitched.
McGehee is slashing just .200/.254/.282 this season.
After allowing a leadoff single, Axford managed to get a fly out to center field, who then doubled off the baserunner trying to advanced to third. Axford then forced a groundout to end the game. Axford lowered his ERA to 0.90 in 10 innings of work.
Petit didn't have any issues until the fourth, when he allowed three consecutive batters to reach base safely, including an RBI double by Brandon Barnes. Then, he forced a groundout by Daniel Descalso, but that also brought home a run.
In the sixth, Petit surrendered a two-run homer to Descalso. Petit, now 1-1, moved his ERA to 3.86 in 28 innings of work.