Alonza Benjamin Bumbry (né Bumbrey; born April 21, 1947) is an American former Major League Baseball (MLB) outfielder who played for the Baltimore Orioles and San Diego Padres from 1972 through 1985. Bumbry was the 1973 American League Rookie of the Year, and went on to be an All-Star and World Series champion. He is an inductee of the Baltimore Orioles Hall of Fame and the Virginia Sports Hall of Fame. Prior to his major league career, Bumbry served in the US Army during the Vietnam War and was awarded a Bronze Star.

Bumbry was born in Fredericksburg, Virginia, and graduated from Ralph Bunche High School in King George, Virginia. He attended Virginia State College on a basketball scholarship, which he played for four years. While Bumbry was at Virginia State, the school restarted its baseball program; Bumbry played during his final year, batted .578, and was named the team's Most Outstanding Player. Bumbry was in ROTC at Virginia State, obligating him to serve for two years in the US military. Bumbry served in the United States Army and led a platoon during the Vietnam War, receiving the Bronze Star Medal.

Bumbry was drafted by the Baltimore Orioles in the 11th round of the 1968 Major League Baseball draft. He started his professional career in 1969 for the Stockton Ports of the Class A California League, where he appeared in 35 games, batting .178 with 3 runs batted in (RBIs) and 10 stolen bases. To fulfill his military service obligation, Bumbry served in the US Army from July 1969 to June 1971, as a platoon leader during the Vietnam War. After his military service completed in 1971, Bumbry appeared in 66 games for the Aberdeen Pheasants of the Class A Northern League, where he batted .336 with 53 RBIs, 6 home runs, and 34 stolen bases. In 1972, Bumbry appeared with two minor league teams; the Asheville Orioles of the Class AA Southern League, and the Rochester Red Wings of the Class AAA International League. He appeared in 134 total games for those teams, batting .345 with 57 RBIs, 10 home runs, and 32 stolen bases.

Bumbry appeared in 9 games for the Orioles late in the 1972 season. His first MLB appearance came on September 5, as a pinch hitter against the New York Yankees; he flied out to center field. After several other pinch hitting and pinch running appearances, Bumbry collected his first hit on October 3, a single against Dick Tidrow of the Cleveland Indians. Bumbry finished the season batting 4-for-11 (.364) with 5 runs scored.

For the 1973 season, Bumbry appeared mostly as a pinch runner during the first month of the season. In May he began to play more, usually batting as the leadoff hitter, then in June he appeared in all but one game the team played, as he was hitting well. At the All-Star break in July he had a .304 average, at the end of August he was batting .312, and he finished the season with a .337 average, and had 34 RBIs, 73 runs scored, 23 stolen bases, and 7 home runs. He also had a league-leading 11 triples, including three on September 22 against the Milwaukee Brewers, tying both the American League (AL) and MLB records for most triples in a single game. Defensively, Bumbry started 82 games in the outfield (58 in left field, 24 in right field) and had a .978 fielding average. The Orioles won the AL East division, but lost to the Oakland Athletics in the ALCS. Bumbry played left field in the third and fifth game of the series; he had a walk in each game, but was hitless in seven at bats. Bumbry was named the AL Rookie of the Year, receiving 13 of 23 first place votes.

Bumbry did not hit well in 1974 – he was batting below .200 as late as July 3, and finished the season with a .233 average, 19 RBIs, 35 runs scored, 12 stolen bases, and 1 home run. Defensively he started 65 games in left field, and had a .953 fielding average. The Orioles again won the AL East, and again lost to the Oakland Athletics in the ALCS. Bumbry made one appearance as a pinch runner, and struck out in one appearance as a pinch hitter. Over the next three seasons, Bumbry batted .269 (1975), .251 (1976), and .317 (1977), as the Orioles finished in second place in the AL East each year. In 1978, Bumbry broke his leg on a slide into second base during a game against the Texas Rangers on May 12. He missed over 100 games before returning to play five games in September – for the season he only appeared in 33 games, and had a .237 average.

The 1979 Orioles won the AL East, and Bumbry batted .285 with 49 RBIs, 80 runs scored, 37 stolen bases, and 7 home runs. Defensively, he started 127 games in the outfield (all but one in center field) and had a .984 fielding percentage. In the ALCS the Orioles defeated the then California Angels in four games – Bumbry was the center fielder in each game, and batted 4-for-16 (.250) in the series. Bumbry made a costly error in the ninth inning of ALCS Game 3, getting a glove on but dropping a Bobby Grich line drive that allowed Rod Carew to score the tying run. The Angels won the game on a walk-off hit during the next at bat, but the Orioles won Game 4 convincingly and spared Bumbry.

The 1979 World Series went the full seven games, with the Orioles losing to the Pittsburgh Pirates despite leading the series 3–1, as the Pirates won the final three games. Bumbry appeared in center field in all seven games – four as a starter, and entering as a pinch hitter in the other three – for the series he batted .143 (3-for-21).