Santos Alomar Conde (/ˈæləmɑːr/; Spanish: [aloˈmaɾ]; October 19, 1943 – October 13, 2025), known as Sandy Alomar Sr., was a Puerto Rican second baseman who played in Major League Baseball (MLB) for fourteen seasons, most notably as a member of the California Angels where he was an MLB All-Star player in 1970. Alomar was a switch-hitter and threw right-handed. He was the father of former MLB All-Star catcher Sandy Alomar Jr. and Hall of Fame second baseman Roberto Alomar.

Alomar was born in Salinas, Puerto Rico, on October 19, 1943, the youngest in a family of nine. He attended Luis Munoz Rivera High School in Salinas. He had three older brothers that played professional baseball, though not in the major leagues.

Alomar signed as an amateur free agent with the Milwaukee Braves in 1960. He was assigned to the Class D Davenport Braves in 1961 when he was 17 years old. He played shortstop and had a .278 batting average in 77 games. In 1962, he played for the Class C Boise Braves of the Pioneer League, where he had a .329 batting average while continuing to play shortstop; with three home runs, 83 runs scored and 72 runs batted in (RBIs). He was the Pioneer League's Most Valuable Player. His fielding percentage was below .900 both seasons.

Alomar was promoted to the Double-A Austin Senators in 1963. He hit .292, with five home runs, with 84 runs, 65 RBIs and 15 stolen bases. His fielding percentage improved to .917 at shortstop. The following season he was promoted to the Triple-A Denver Bears of the Pacific Coast League. His fielding percentage at shortstop improved to .944; while batting .263, with 86 runs, 40 RBIs, three homes runs and 20 stolen bases in 34 attempts.

He was called up to the Braves in September 1964 and made his major league debut on September 15, playing shortstop. He had a base hit in his first game, and played 19 total games at shortstop for the Braves in 1964. In 1965, he split the season between the Milwaukee Braves (67 games) and the Triple-A Atlanta Crackers (66 games) and hit below .250 for both teams. He played both shortstop and second base for the Crackers and the Braves.

Alomar played the majority of the 1966 season with the Triple-A Richmond Braves, batting .243 in over 400 plate appearances, and now playing third base as well as at shortstop and second base. The Braves moved to Atlanta in 1966, and Alomar played in 31 games for the Braves at second base and shortstop, batting .091.

On February 25, 1967, Alomar became part of an earlier trade between the Braves and Houston Astros that sent Eddie Mathews and Arnold Umbach to Houston for Dave Nicholson and Bob Bruce. Before the 1967 season started, Alomar was traded again to the New York Mets for Derrell Griffith. Alomar played the majority of the 1967 season with the Jacksonville Suns, the Mets' Triple-A affiliate, under manager Bill Virdon, playing principally at shortstop (though he played the other three infield positions as well) and batting only .209. He joined the Mets for 15 games, going hitless in 22 at-bats. Alomar had thought about quitting U.S. baseball when he was told he was a good fielder but could not hit and was sent to the minor leagues that year; but realized he had a family to provide for and continued to play.

Alomar played in the Puerto Rican Winter League during most of his minor and major league career.