In Baltimore, Cal Ripken’s second grand slam of the season is the big blow in a six-run 3rd inning as the Orioles beat the hapless Phillies, 8 – 1. Mike Mussina wins his 100th game to help Baltimore end its four-game losing streak. For the Phils, it is their 15th loss in 16 games.

On June 30, 1997 In Baltimore, Cal Ripken’s second grand slam of the season is the big blow in a six-run 3rd inning as the Orioles beat the hapless Phillies, 8 – 1. Mike Mussina wins his 100th game to help Baltimore end its four-game losing streak. For the Phils, it is their 15th loss in 16 games.

Source
Baseball Reference June 30