Dodgers manager Joe Torre said that Blake showed signs of improvement while taking ground balls before Sunday's game against Atlanta.
It was previously said that if Blake's condition didn't improve by Sunday, then he probably would have been put on the DL.
"It was definitely a step forward today," Torre said. "If he just was status quo, [we] probably were leaning toward disabling [him]. But he showed progress today."
While sitting in front of his locker, Blake said that he felt better overall in terms of being able to twist and extend his back.
"I'm supposed to sit here for 10 minutes and maybe go hit a little bit in the cage and see how it responds," Blake said. "Hopefully we can make a determination by the end of the day or tomorrow."
Blake has been out of the lineup since last Wednesday, when he went 1-for-4 in a 1-0 win over Arizona.
Though there was a more hopeful tone surrounding Blake's status, Torre still has not ruled out a possible trip to the DL.
"If it gets to a point where it stops getting better, I think we have to maybe disable him," Torre said. "But as long as it continues to get better, then I think we might be three days away."