SAN FRANCISCO — Jorge Soler on Thursday underwent an MRI in San Francisco, and it showed a mild strain of his left hamstring, Braves manager Brian Snitker said. Soler is day-to-day.

Was this the best-case scenario?

“I don’t know,” Snitker said after Thursday’s loss to the Giants. “With those things, they’re so different with everybody. The mild ones linger. Hamstrings and oblique, you can get them looked at, but everybody’s different, everybody heals different. They’re so tentative and all. It literally is a day-to-day thing, how they feel and what they can do.”

Through interpreter Franco García, Soler said he won’t play Friday. He’s unsure if he’ll play Saturday or Sunday.

“I woke up (Thursday) morning feeling better,” Soler said Thursday. “Yesterday, I had a little bit of soreness, and today I woke up feeling better. I’m not sure how I’m going to wake up feeling (Friday), but I’m just taking the good news and today I’m feeling better.”

Soler exited Wednesday’s win at Oracle Park after grounding out to the pitcher in the top of the fourth inning. He didn’t pull up suddenly or give any other indication he injured himself.

On Wednesday, Soler led off the game with a hit by pitch. He is 11-for-31 with two doubles, four home runs and 10 RBIs over his past nine games. He also has five walks since the Braves traded for him.

Soler’s 22-game on-base streak is the second-longest active run in baseball.

The Braves hope this mild strain isn’t serious and that he returns as soon as possible. But it’s a bummer for Soler.

“I hate it for us, too,” Snitker said. “He kind of was starting to get ‘er going.”

The Braves took three of four games against San Francisco. They sit in the National League’s third wild-card spot, and lead everyone else by at least two games.