At Candlestick Park, Doug Rader, batting eighth, plays the entire game without getting an official at-bat. The Cardinals walk the Giants catcher four times, three intentionally, to get to John Montefusco, the Giants starter, who goes 0-for-4 at the plate but tosses a complete game to get the win in San Francisco’s 5-2 victory.

To quell a controversy over deserving players not being selected for the All-Star Game, Commissioner Bowie Kuhn grants permission to both leagues to increase their roster size to 29 players for next week’s contest in Kansas City’s Royals Stadium. The National League selects fading superstar Willie Mays, with the Junior Circuit adding Nolan Ryan, who was not originally picked by American League manager Dick Williams although the Angel right-hander was the first pitcher since Johnny Vander Meer, the starter in the 1938 Midsummer Classic, to have two no-hitters before the break.

At Three Rivers Stadium, Luke Walker singles off Cecil Upshaw to break an 0-for-39 drought at the plate. The Pirates’ southpaw pitches three innings of one-hit shutout baseball to pick up a save in the 8-3 victory over the Braves.

The Twins and Pilots suspend an 16-inning game at 7 – 7.

At War Memorial Stadium in Buffalo, a knife-wielding gang takes over the clubhouse during batting practice. The International League game is postponed due to “threatening weather.”

Washington starter Joe Coleman throws his third consecutive shutout when he blanks the Bronx Bombers, 4-0. The 22 year-old right-hander, the Senators’ first-round pick (third overall) of the amateur draft in 1965, faces only 29 batters in his two-hit masterpiece in New York.

Tom Matchick’s two-run home run gives Detroit a dramatic 5-4 walk-off victory over Baltimore at Tiger Stadium. The rookie shortstop’s round-tripper, the first of only four he will hit in his six-year major league career, comes with two outs off Moe Drabowsky.