The last segment of Connie Mack Stadium, formerly known as Shibe Park, is demolished when the corner tower and its domed cupola of the A’s and Phillies’ former home is torn down. In 1991, the Deliverance Evangelistic Church, an independent Pentecostal congregation, will construct a church building on the site.

A tentative agreement between the players and owners on labor contracts is reached. The formal agreement will be announced August 9th.

In a pre-game promotion at Atlanta-Fulton County Stadium, 34 couples are married at home plate. The nuptials are then followed by Championship Wrestling in an evening billed as “Headlocks and Wedlocks.” The Braves then pin a 9 – 8 loss on the Mets.

Before 53,328 in Cincinnati, the Pirates score two runs in the 10th on a Richie Zisk homer and take an 11 – 9 lead, only to lose to the Reds, 12 – 11. George Foster’s single scores the tying and winning runs.

Boston Red Sox owner and president Tom Yawkey dies.

At Fenway Park, the Red Sox beat the Twins, 8 – 4, as their attendance reaches 1,007,491. It’s the earliest date in club history they’ve topped the million mark.

The Reds come back from a three-run deficit to beat the Expos, 4 – 3. Cincy scores three in the 9th, with two scoring on Cesar Geronimo’s triple.

Houston’s J.R. Richard allows 10 walks but no runs in shutting out the Mets, 1 – 0, in 10 innings. Starter Jon Matlack is the losing pitcher.