Myers was fielding grounders at third base during batting practice Wednesday prior to a game against the Colorado Rockies when a ball went over his glove and struck him. Myers fell to the dirt as teammates rushed in to check on him. Myers left the field holding a towel over his face with a trainer near his side.
Myers was scheduled to make his eighth start at third base as the Padres experimented with sliding the veteran first baseman across the infield. Myers was later scratched from the starting lineup. Cory Spangenberg moved from second to play third base, while Jose Pirela took over at second.
Padres manager Andy Green said after his team's 6-2 loss that Myers did not suffer a concussion.
"He definitely took a hard one off the face. I don't know that he was ever pretty but he's definitely not pretty right now,'' Green said. "Probably down [Thursday] and hope we can get him back in rhythm in L.A.''
In addition, infielder Christian Villanueva has a fractured finger and will be placed on the disabled list, Green said.
The Associated Press contributed to this report.