"Zach's been here and been having some tingling in his fingers," Mattingly said. "He's here to get checked out. We obviously don't have that report on how that's going or how that went."
The 23-year-old Lee is on the Dodgers' 40-man roster.
Lee has spent the entire season in Triple-A. He is 5-3 with a 2.38 ERA in 10 starts. In 56 2/3 innings, Lee has 44 strikeouts and allowed 12 walks.
Steve Bourbon is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.