(Updated July 1, 2019)
In the most productive month of his Cardinals playing career, Mike Shannon hit home runs off future Hall of Famers Sandy Koufax, Juan Marichal and Gaylord Perry, achieved his lone five-hit game in the big leagues and re-established his status as a reliable everyday player.
In July 1966, Shannon entered the month with a .222 batting average for the season. He exited the month with a season batting mark of .304.
Shannon, the Cardinals’ right fielder, hit .395 (45-for-114) in July 1966, with 17 extra-base hits (seven home runs, eight doubles and two triples), nine walks, 23 RBI and 25 runs scored. His on-base percentage for the month was .435.
Bad habits
The Cardinals opened the 1966 season with a starting outfield of Alex Johnson in left, Curt Flood in center and Lou Brock in right. Johnson struggled to hit for average and was sent to the minor leagues in May. Brock was shifted to left and Shannon took over in right.
However, like Johnson, Shannon also struggled. He hit .197 (13-for-66) in May and .222 (12-for-54) in June.
“Mike was too much of a guess hitter and a guess hitter is a .250 hitter or lower,” Cardinals hitting coach Dick Sisler told The Sporting News.
Said Cardinals manager Red Schoendienst: “Every time someone on the club would hit a home run, Mike would try to hit one farther.”
Solving Sandy
On July 1, 1966, Shannon’s turnaround began against the unlikeliest of opponents. Koufax entered his start for the Dodgers against the Cardinals at Los Angeles with a season record of 14-2 and a 1.56 ERA. His last five decisions against the Cardinals all were wins.
In the seventh inning, with the score at 0-0 and one out, Orlando Cepeda singled. Shannon batted next and worked the count to 3-and-1. “Shannon was the only batter Koufax got behind,” Schoendienst said to the Pasadena Star News.
Koufax told the Los Angeles Times, “With Cepeda on first base and the count 3-and-1 on Shannon, I didn’t want to walk him and put a runner in scoring position, so I had to try to blow one by him.”
The next pitch was a fastball and Shannon hit it for a home run into the seats in left-center at Dodger Stadium.
“The fastball was right down the middle,” Shannon said to the St. Louis Post-Dispatch.
Koufax said, “Outside of that one pitch, I thought I had the best stuff I’ve had this year. My curve was working again.”
Said Shannon: “He worked fastballs in and out to me and I finally got one I could hit off him. I’m glad he didn’t throw me a curve.”
The combination of Shannon’s power and the shutout pitching of Al Jackson carried the Cardinals to a 2-0 victory. It was “a measure of sweet revenge” for Jackson, who had lost 10 of 11 previous career decisions versus the Dodgers, the Los Angeles Times reported. Boxscore
Picking his pitch
In seven games at Los Angeles and San Francisco over the first six days of July, Shannon produced 12 hits in 27 at-bats, including the home runs off Koufax, Marichal and Perry, and a triple off another future Hall of Fame pitcher, Don Drysdale. The home runs against Marichal and Perry occurred on the same day, July 4, with Shannon hitting one in each game of a doubleheader.
Said Perry of Shannon’s blast: “It was a good pitch _ a slider away from him. I pitched against him a lot in the minors and when Mike is hitting good you can’t get him out.”
Shannon’s hot streak continued throughout July.
On July 15, Shannon’s 27th birthday, he had four hits in five at-bats in a game against the Reds at Cincinnati. Boxscore
A week later, on July 22, Shannon was 5-for-5 in a game versus the Cubs at Chicago. Boxscore
“Mike has been picking the good pitches consistently for a change,” said Sisler. “He’s not lunging the way he used to. He’s not trying to pull those outside pitches for home runs. He’s making the pitchers come to him.”
Bob Skinner, a Cardinals reserve outfielder and friend of Shannon, said, “Mike has been looking like an altogether different hitter. He’s hitting more home runs than ever because he’s just meeting the ball instead of swinging like a wild man.”
Shannon finished the 1966 season with a .288 batting average and a career-best 16 home runs. He was converted to a third baseman after the season and started for the 1967 and 1968 Cardinals clubs that won two NL pennants and a World Series title.
Previously: Here’s how Mike Shannon became a Cardinals catcher
Previously: The stormy, unfulfilled Cardinals career of Alex Johnson
RetroSimba 
Our beloved announcer didn’t fair to well against Koufax, Marichal, Perry and Drysdale. Lifetime he went 25 for 151 against them. That basically means that he picked up half of those 25 hits during that week in July of ’66.
Thanks for doing that research!