Dickerson was drilled on the helmet by the Orioles' Mike Gonzalez in the 15th inning of the Yankees' 4-1 win at Camden Yards, and a CT scan taken at a local hospital revealed the concussion.
Dickerson expects to be able to avoid Major League Baseball's new seven-day disabled list for concussions, though Yankees manager Joe Girardi said he would need to confer with team physician Christopher Ahmad and head trainer Gene Monahan.
"Unless I get lost on the way home or forget what city I came from, I should be fine," Dickerson said.
Dickerson said that Monahan put him through a battery of exams that included recognizing shapes and images, as well as judging reaction time. He planned to resume swinging a bat on Friday.