What happened: MLB asked every team to send three jerseys worn at the home opener to league offices, and the Nationals sent those worn by Dunn, Zimmerman and Elijah Dukes. A new batch was shipped to the District, and those jerseys were used Friday. Dukes' lettering was fine; the other two weren't.
"We checked the backs of the new jerseys when they came in," clubhouse manager Mike Wallace said. "We never thought we had to check the front, too."
The mistake was discovered in the fourth inning. Dunn and Zimmerman returned for the fifth with the correct uniforms.