San Diego Padres' Yu Darvish dealing with bad back; Blake Snell, Drew Pomeranz put on IL

San Diego Padres pitcher Yu Darvish will not participate in next week's All-Star Game after the right-hander exited Thursday's start with back tightness, manager Jayce Tingler said.

"Without getting into detail, I think he's going to be in a good place in a couple days," Tingler told reporters Friday about Darvish's condition. "But I do feel it's going to be tough for him to be able to go [to the All-Star Game], just knowing how he's feeling with his back and hip right now."

He was officially ruled out Saturday.

Tingler said "things could change," but he expects Darvish won't miss a start for the Padres entering the second half of the season.

Darvish pitched only three innings in Thursday's 9-8 victory over the Washington Nationals, giving up six runs on eight hits. He has a 7-3 record with a 3.09 ERA and 125 strikeouts.

In addition, the Padres placed left-handers Blake Snell(gastroenteritis) and Drew Pomeranz(left forearm inflammation) on the 10-day injured list.

Snell, who is 3-3 with a 4.99 ERA, has been dealing with stomach issues. His move is retroactive to July 6. Pomeranz has a 1.59 ERA in 18 appearances, with his move retroactive to July 7.

San Diego called up right-handers Reiss Knehr, who will start Friday's game vs. Colorado, and Miguel Diaz from El Paso.

The team also designated right-hander Aaron Northcraft for assignment, and sent catcher Austin Nola to El Paso to begin a rehab assignment.