In the 2010–11 off-season the Braves acquired former Florida Marlins starting second baseman Dan Uggla in a trade for Omar Infante and reliever Mike Dunn. Although the trade was widely praised, it left the Braves in a conundrum as they now had two All Star starting second basemen on the roster. Prado was approached about moving to left field, which he did without any public complaint. On May 13, 2011, in a game versus the Washington Nationals in which the Braves were trailing 5–1 in the 7th inning, Prado notched his second career grand slam after a 10-pitch duel with Nationals reliever Sean Burnett, putting the Braves on course to win 6–5 in the 10th inning.