SAN FRANCISCO >> Dodgers pitcher Hyun-Jin Ryu met with team physician Dr. Neal ElAttrache here Saturday, one day after inflammation in his left shoulder forced him to leave the Dodgers’ 9-0 loss to the San Francisco Giants after one inning.

ElAttrache ordered an MRI on Ryu’s left shoulder, and the pitcher wait until Monday in Los Angeles to get that done.

“They could’ve done the MRI (here) but they weren’t confident — the regular Giants guys were gone,” Dodgers manager Don Mattingly said.

Ryu is “very doubtful” for his next start Wednesday in Denver, Mattingly said. Rookie right-hander Carlos Frias is lined up to start the game instead.

Ryu is 14-7 with a 3.38 ERA in 26 starts this season. His high ground ball to fly ball ratio (1.59, 18th among NL starters) makes him an ideal pitcher to start a game at Coors Field. His turn in the rotation is scheduled to come up twice during the Dodgers’ final homestand of the season, against the Giants and Rockies, respectively.

“When one guy goes down, somebody else has to pick it up,” Mattingly said. “I kind of look at what the Angels have been doing ever since (Garrett) Richards went down. Everybody was like, ‘the world’s going to end,’ and they’ve been on fire ever since. So obviously we’re better with him than without him. Hopefully it’s short-term.”

Ryu missed three starts in April with a shoulder injury, the severity of which (in his own words, through an interpreter) was “very similar” to what he felt Friday.

But the news could have been worse.

“Stan (Conte, the Dodgers’ head athletic trainer) felt like the exam today was OK in certain spots, the back of the shoulder,” Mattingly said.