At County Stadium, utility man Nino Escalera becomes the first black player to appear in a Cincinnati uniform. A native of Puerto Rico, Escalera pinch-hits a single in the Redlegs’ 5 – 1 loss to the Milwaukee Braves. In the 7th inning, another black rookie, Chuck Harmon, follows him, pinch-hitting for Corky Valentine and pops out. Escalera, who will bat .159 and collect 11 hits in his only major league season, will eventually become a scout for the Oakland Athletics.

On April 17, 1954 – – At County Stadium, utility man Nino Escalera becomes the first black player to appear in a Cincinnati uniform. A native of Puerto Rico, Escalera pinch-hits a single in the Redlegs’ 5 – 1 loss to the Milwaukee Braves. In the 7th inning, another black rookie, Chuck Harmon, follows him, pinch-hitting for Corky Valentine and pops out. Escalera, who will bat .159 and collect 11 hits in his only major league season, will eventually become a scout for the Oakland Athletics.

 

Source 

Baseball Reference April 17