At Yankee Stadium, Roger Maris cracks a 7th-inning solo home run against the Indians, and also is credited – erroneously, as it turns out – with a 3rd inning RBI on a single. The two RBIs are officially recorded, though just one appears in the game’s box score, and the error will not be noted until 1995. With the correction, Maris and Jim Gentile become co-leaders in RBIs for the season.

This Day In Baseball

On July 5, 1961 At Yankee Stadium, Roger Maris cracks a 7th-inning solo home run against the Indians, and also is credited – erroneously, as it turns out – with a 3rd inning RBI on a single. The two RBIs are officially recorded, though just one appears in the game’s box score, and the error will not be noted until 1995. With the correction, Maris and Jim Gentile become co-leaders in RBIs for the season.

Source
Baseball Reference July 5