Joseph Vincent McCarthy (April 21, 1887 – January 13, 1978) was an American manager in Major League Baseball, most renowned for his leadership of the "Bronx Bombers" teams of the New York Yankees from 1931 to 1946.

McCarthy's career winning percentages in both the regular season (.615)[1] and postseason (.698, all in the World Series)[1] are the highest in major league history.

After attending Niagara University in 1905 and 1906 on a baseball scholarship, he spent the next 15 years in the minor leagues, primarily as a shortstop and second baseman with the Toledo Mud Hens, Buffalo Bisons, and Louisville Colonels.

[6] With the Yankees, his strict but fair managing style helped to solidify the team's place as the dominant franchise in baseball.

Turning tearfully to Gehrig, he said, "Lou, what else can I say except that it was a sad day in the life of everybody who knew you when you [...] told me you were quitting as a ballplayer because you felt yourself a hindrance to the team.

After the Yankees lost two straight to Cleveland, a drunken McCarthy chewed out pitcher Joe Page for spending too many nights out late.

"[6] In the 1948 season he managed the Red Sox to a 96–59 record; however, Boston fell short of the pennant when they lost in the 1948 American League tie-breaker game to the Cleveland Indians 8–3.

Yet McCarthy was an outstanding teacher and developer of talent, and was particularly adept at handling temperamental players such as Babe Ruth, who had hoped to become New York's manager and resented a team "outsider" being hired.

[9] While managing, McCarthy utilized a low-key approach, never going to the mound to remove a pitcher or arguing with an umpire except on a point of the rules, preferring to stay at his seat in the center of the dugout.

[10][11] In order to draw attention to his presumed masterful leadership of the Yankees, McCarthy was given the nickname of "Marse Joe" by sportswriters.

[12] McCarthy's success throughout his career was such that in 32 years of managing, his 1922 Louisville club was the only team that finished either with a losing record or below fourth place.

[13] In a 1969 poll by the Baseball Writers' Association of America to commemorate the sport's professional centennial, McCarthy finished third in voting for the greatest manager in history, behind John McGraw and Casey Stengel.