"He's still got a little movement in his hands, but it's certainly not as drastic as it was. He's more upright," Collins said. "They said he's driving the ball the other way more than he was when he got there."
But Davis is still having some struggles. The 26-year-old went 0-for-5 with three strikeouts on Monday night.
The Mets have gotten plenty of production from first baseman Josh Satin, who has a seven-game hitting streak entering Tuesday's game against Arizona. Since being called up to the Mets on June 11, Satin is hitting .395 with a .511 on-base percentage.
While the Mets are going to be facing mostly right-handers over the next week or so, the left-handed hitting Davis' future remains uncertain for now.
"He's made big progress, and I certainly don't know if he's going to get called up or not," Collins said. "We've certainly got some things we need to address in the next couple days."