Adduci struck out in his second at-bat Monday against Pirates starter Gerrit Cole and felt a spasm in his right shoulder. He then felt his right arm go numb.
"It was something I never experienced before," Adduci said. "It kind of caught me by surprise. I tried to squeeze my hand and get the feeling back, but it wouldn't come back. It was kind of scary. It just made my arm numb."
The numbness eventually went away. Adduci underwent some tests and nothing serious was found. He had no problems taking batting practice Tuesday.
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, and follow him on Twitter @Sullivan_Ranger. Master Tesfatsion is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.