Stanley Raymond "Bucky" Harris (November 8, 1896 – November 8, 1977) was an American professional baseball second baseman, manager and executive. While Harris played in Major League Baseball (MLB) for the Washington Senators and Detroit Tigers, it was his long managerial career that led to his enshrinement in the Baseball Hall of Fame by the Veterans Committee in 1975.

Hired by the Senators to act as player-manager at the age of 27, Harris would lead the team to the 1924 World Series title, becoming the youngest manager to win a championship and the first rookie manager to do so (four other rookies have accomplished the feat since). Harris managed 29 seasons, fourth most in MLB history. In his tenure as manager for five teams (with three terms for Washington and two for Detroit), Harris won over 2,150 games, three league pennants and two World Series championships (1924 with the Senators and 1947 with the New York Yankees); the gap between Harris's World Series appearances (22 years) and championships (23) are the longest in major league history.

Stanley Raymond "Bucky" Harris was born on November 8, 1896, in Port Jervis, New York, and raised after the age of six in Pittston, Pennsylvania. He was of Swiss and Welsh descent. His father, Thomas, had emigrated from Wales, while his mother, Catherine (Rupp), hailed from Hughestown, near Pittston. His elder brother, Merle, was a minor league second baseman. Bucky Harris left school at age 13 to work at a local colliery, the Butler Mine, as an office boy and, later, a weigh master. In his spare time, Harris played basketball for the Pittston YMCA team as well as sandlot baseball.

Harris was listed as 5 feet 9 inches (1.75 m) tall and 156 pounds (71 kg); he threw and batted right-handed. In 1916, when Harris was 19, Pittston native Hughie Jennings, then the manager of the Detroit Tigers, signed him to his first contract and farmed him to the Class B Muskegon Reds of the Central League, where he struggled as a batsman and was released. Harris then caught on with the Scranton Miners, Norfolk Tars and Reading Pretzels through 1917, before reaching the highest level of minor league baseball with the 1918–1919 Buffalo Bisons of the International League. Harris improved his batting skills during the latter season with the Bisons, making 126 hits and raising his average to .282.

Harris then was recommended to the Washington Senators by baseball promoter Joe Engel, who led the Chattanooga Lookouts at Engel Stadium. In August 1919, at the age of 22, he came up to Washington but was unimpressive at first, batting a meager .214 and getting into only eight games that first season. Despite this poor showing, owner-manager Clark Griffith made him Washington's regular second baseman in 1920, and before long Harris was batting .300 and making a mark for himself as a tough competitor, standing up to even ferocious superstar Ty Cobb, who threatened Harris when he tagged Cobb in their first encounter.

Harris spent most of his playing career as a second baseman with the Senators (1919–1928). In 1924, he was named player-manager; at the age of 27 he was the youngest manager in the Majors. He proceeded to lead the Senators to their only World Series title in Washington in his rookie season, and was nicknamed "The Boy Wonder." He won a second consecutive American League pennant in 1925, but the Senators lost the 1925 World Series in Pittsburgh in the late innings of Game 7 after leading 3–1 in the Series. Baseball historian William C. Kashatus wrote of his dominant play in the 1924 World Series: "Not only did he set records for chances accepted, double plays and put-outs in the exciting seven-game affair, but he batted .333 and hit two home runs" — including an important roundtripper in Game 7 which opened the scoring and gave Washington a 1–0 lead in the 4th inning. These feats are even more impressive considering that the light-hitting Harris only hit nine home runs during his entire career.

After Harris‘ back-to-back pennants in 1924–1925, he was able to keep the Senators in the first division for the next three seasons, but their win totals declined, from 96 (1925) to 81 (1926), then 85 (1927).

When, in 1928, they won only 75 games (against 79 losses), Griffith traded Harris to Detroit and changed managers, with Hall of Fame pitcher Walter Johnson named as his successor. The 1928 Tigers had won only 68 games, and Harris' 1929 edition offered only a slight improvement, winning 70. Harris’ initial departure from the Senators in 1928 (he would twice return to manage them again from 1935 to 1942 and 1950–1954) came in a trade to the Tigers as player-manager. Although he retired as a player after the 1931 season, his playing career effectively ended with his trade to Detroit. Harris only made 11 cameo appearances in the Tiger lineup: seven in 1929 and four in 1931. In all, he appeared in 1,263 games over all or portions of 13 seasons, and collected 1,297 hits, with 224 doubles, 64 triples, nine home runs, 472 bases on balls, and 167 stolen bases. Harris batted .274 lifetime with 508 career runs batted in.