PHOENIX -- The D-backs made another pair of roster moves on Thursday and more loom on the horizon as soon as Friday.
Outfielder Steven Souza Jr. was activated from the disabled list where he has spent most of the season due to a strained right pectoral muscle. He went 0-for-3 with a walk in the club's 6-3 loss to the Padres at Chase Field.
To make room on the roster, right-hander Joey Krehbiel was optioned to Triple-A Reno.
Outfielder Jarrod Dyson was placed on the 10-day disabled list with what manager Torey Lovullo said was a lower core injury, which Dyson suffered in the seventh inning on Wednesday night.

To take Dyson's place, the club recalled right-hander Silvino Bracho to provide an extra arm in the bullpen.
"We don't know the extent of it yet," Lovullo said of Dyson's injury. "We're still researching that right now."
Dyson is set to see a specialist on Friday, at which time the team hopes to have a clearer idea of the injury and recovery time.
Reliever Randall Delgado's 30-day injury rehab assignment ended on Thursday, and he was en route to Phoenix and scheduled to be activated on Friday.
Catcher Alex Avila, who has been on the DL with a right hamstring strain, will be activated any day now, according to Lovullo.
When Delgado and Avila return, it's likely the D-backs would send out a pair of pitchers to make room for them given that they are currently carrying an extra reliever.
"There are a lot of tough decisions to make," Lovullo said. "We have a lot of conversations to have."
Slowing it down
Souza began the season on the DL after injuring the pec during Spring Training and he was activated May 3. The timeline proved to be too aggressive as he was placed back on the DL on May 22 while hitting just .163.
This time around, Souza was forced to be more patient with his recovery.
"I think I kind of learned my lesson in rushing things back," Souza said. "The training staff did an unbelievable job from the guys in the Minor Leagues to here just slowing me down and making sure everything was 100 percent, and going to stay at 100 percent."
Not a record you want
Outfielder A.J. Pollock was hit in the left forearm by a Jordan Hicks pitch in the seventh inning against the Cardinals on Wednesday night, and, as it turns out, it was record setting.

The fastball registered 104.3 mph according to Statcast™, the fastest pitch to hit a batter since pitch tracking began in 2008.
"I'm excited to be making history," Pollock said jokingly. "They're going to give me the ball and stuff so I'll have it in my locker."
On a serious note, Pollock, who had just returned from more than six weeks on the DL with an avulsion fracture of his left thumb, was just glad he did not get injured.
"You see a ball coming at you like that there's not a whole lot you can do," Pollock said. "I'm very, very grateful that I feel good and am ready to play today. Honestly, I was just lucky. I think it was just millimeters away from doing some really bad damage, but fortunately just a little bit of a bruise, a little sore, but everything is good."