Miami Marlins at Milwaukee Brewers

"The Brewers wore replicated uniforms of the Milwaukee Bears from 1923. Their opponents wore uniforms of the 1956-60 Triple-A Miami Marlins with a patch on a sleeve to honor Hall-of-Famer Satchel Paige, who pitched for the Marlins from 1956-58."

St. Louis Cardinals at Pittsburgh Pirates

Chicago White Sox at Detroit Tigers

Cincinnati Reds at Milwaukee Brewers

Philadelphia Phillies at Atlanta Braves

In a Negro League throwback game, the Braves dressed as the Atlanta Black Crackers, and the Phillies were again the Philadelphia Stars. The day following, the same two teams would play again in the 2011 Civil Rights game, wearing 1970s-1980s throwbacks.

Baltimore Orioles at Kansas City Royals

The visiting Baltimore Orioles dressed as the 1950s Baltimore Elite Giants and the Royals were dressed as the 1949 Kansas City Monarchs as the teams played in an annual Negro League tribute game. Billy Butler's two-run home run in the eighth inning was the difference as the Royals won 4-3.

Pittsburgh Pirates at Detroit Tigers

Another Negro League matchup, as the Pirates dressed as the Pittsburgh Crawford(s) again, and the Tigers were again the Detroit Stars.

Washington Nationals at Cleveland Indians

Atlanta Braves at Milwaukee Brewers

In the comments, werthj tells us of this game, where the Brewers wore the uniforms of the Milwaukee Bears and the Braves were the Atlanta Black Crackers, two negro league teams.

Article about this from the Borchert Field website can be viewed here.

Cleveland Indians at Detroit Tigers

Chicago White Sox at Kansas City Royals

Source: Kansas City Baseball blog