From Cardinals Journal, by John Snyder, pages 195-198:
March 6 - The Cardinals announce that they will use uniform numbers in 1923. At the time, no club in the majors placed numbers on uniforms, although the numerals on jerseys had been in use by leading college football teams for many years. Previously, baseball clubs had numbers for each player on the scorecards and posted the corresponding number on the scoreboard as each player came to bat to help fans identify the players, and in some cases, the full batting order was placed on the scoreboards. The numbers on the 1923 Cardinals' uniforms were about six inches high on the left sleeve, but were so small that it was almost impossible to read them from the stands. The experiment was dropped before the season was over, in part because concessionaires complained about the drop in scorecard sales. The first club to use permanent numbers on the backs of uniforms was the Yankees in 1929. By 1932, all clubs in the majors affixed numbers to their uniforms.
May 8 - Rogers Hornsby tears muscles in his knee rounding second base in the fifth inning of an 11-3 win over the Phillies in Philadelphia.
After playing in every game in both 1921 and 1922, Hornsby was limited to 107 games in 1923 because of the knee injury and other incidents. He tried playing two weeks later but eventually spent two weeks in a cast. When he returned June 14, he homered in a 3-2 victory over the Braves, but quickly left the lineup again. Hornsby also missed time because of the illness of his mother and personal problems, including a divorce. He was suspended by Branch Rickey for five games and $500 when Hornsby left the club feigning to be ill despite a doctor's diagnosis to the contrary. Rickey and Hornsby actually duked it out in the clubhouse one day. Despite all of the problems, Hornsby led the NL in batting average (.384), on-base percentage (.459), and slugging percentage (.627) and hit 17 homers. The Cardinals brass decided they no longer required his services, however, and shopped Hornsby all winter. The Giants, Cubs, Braves, and Dodgers all made lucrative offers, but Rickey and Sam Breadon pulled him off the market (see February 21, 1924).
July 13 - Rogers Hornsby collects five hits, including a triple and a double, in five at-bats during a 10-6 victory over the Braves in Boston.
September 3 - Rogers Hornsby homers off Vic Keen in the eighth inning to lift the Cardinals to a 1-0 win over the Cubs in the first game of a doubleheader in Chicago. Johnny Stuart pitched the shutout.
February 21 - Branch Rickey and Rogers Hornsby bury the hatchet after feuding for much of the 1923 season, and after Rickey spent much of the 1923-24 offseason trying to trade his star second baseman. In a meeting with St. Louis reporters, Hornsby said, "There is no longer any misunderstanding between us. I want to have the best year in baseball I ever had and I want the Cardinals to have the best year it ever had."
Hornsby responded with one of the greatest seasons of any player in big-league history. He set a modern major league record for highest batting average in a single season by hitting .424. He led the NL in on-base percentage (.507), slugging percentage (.696), runs (121), hits (227), doubles (43), total bases (373), and walks (89). Hornsby's 25 homers were second in the league and he drove in 94 runs. It was not a good year for the ballclub, however. The progress the Cardinals made by competing for the pennant in 1921 and 1922 looked like a mirage when the team fell into sixth place with a record of 65-89.
August 20 - The Cardinals take a doubleheader from the Phillies at Sportsman's Park by scores of 3-1 and 13-10. Wattie Holm collected seven hits in ten at-bats and Rogers Hornsby was 6 for 7, including two doubles.
August 21 - Rogers Hornsby collects seven hits, including two homers, in seven at-bats during a doubleheader, but the Cardinals lose twice, 6-4 and 12-1 to the Giants. In consecutive doubleheaders, Hornsby picked up 13 hits in 14 at-bats.
August 22 - Rogers Hornsby runs his streak of hits in consecutive at-bats to nine with a homer in his first at-bat of a 6-4 loss to the Giants at Sportsman's Park. The hit also gave Hornsby 14 hits in a span of 15 at-bats over five games.
August 24 - The Cardinals swamp the Dodgers 7-6 and 17-0 in a doubleheader at Sportsman's Park. In the opener, Rogers Hornsby hit a walk-off homer in the ninth. In the second tilt, the Cards collected 25 hits. Verne Clemons was 5 for 5 on a double and four singles.
August 26 - Rogers Hornsby collects three doubles and a homer, but the Cardinals lose 7-4 to the Dodgers at Sportsman's Park.
From August 20 through 29, Hornsby had an incredible streak of 34 hits in 51 at-bats. Among the 34 hits were seven homers, two triples, and seven doubles, a total of 66 total bases. The streak ended when Hornsby wrenched his back in the fourth inning of a 12-5 win over the Cubs in Chicago that put him out of the lineup for nine days.
"It ain't braggin' if you can do it!" Dizzy Dean
"There's no question in my mind that the best club I ever played with was the happily efficient Cardinal team of 1931." Frankie Frisch
"I've seen a lot of great ballclubs in my day, but for pitching, hitting, spirit, and all-around balance, I would back my 1931 Cardinal team against any of them." Gabby Street