A World Series champion with the Pirates in 1979, Stennett is one of two players to collect seven hits in a nine-inning game, which he did in a 22–0 victory over the Chicago Cubs, in 1975.

Stennett piqued the interest of the New York Yankees, San Francisco Giants, and Houston Astros, who wanted him to continue his schooling in the United States and develop him into a pitcher.

[5][6] On September 1, Pittsburgh faced the Phillies with the first major league all-Black and Latino starting lineup[2][7] Stennett led off the game for the Pirates, who won 10–7.

[1] Following the 1973 season, Pittsburgh traded incumbent second baseman Dave Cash to Philadelphia and gave Stennett the starting job.

[11] Pittsburgh also set a major league record for the largest winning score in a shutout game in the modern era[11] (later matched by the Cleveland Indians in 2004).

[2] On August 21, 1977, Stennett was batting .336 for the season, but he broke his right leg while sliding into second base in a game versus San Francisco.

[15] He was out for the year and had fewer than the required number of plate appearances (12), falling short of qualifying for the batting title, won by teammate Dave Parker (.338).