Samuel Onofrio Haggerty (born May 26, 1994 in Phoenix, AZ) is a professional baseball infielder for the Seattle Mariners of Major League Baseball (MLB). He previously played for the New York Mets. He is known for using the theme music from "The Godfather" for his walk-up music, choosing it to honor his mother and their Italian heritage.

Sam attended the University of New Mexico, where he played college baseball for the Lobos. In his first year, Haggerty was awarded as the co-Freshman of the Year of the Mountain West Conference and named to the Louisville Slugger Freshmen All-American team. In 2014, he played collegiate summer baseball with the Hyannis Harbor Hawks of the Cape Cod Baseball League. He was drafted by the Cleveland Indians in the 24th round of the 2015 MLB Draft and was assigned to their minor league system.

On January 6, 2019, Haggerty and Walker Lockett were traded to the New York Mets in exchange for Kevin Plawecki. He split the 2019 minor leagues season between the Brooklyn Cyclones, Binghamton Rumble Ponies, and the Syracuse Mets, hitting .271/.369/.387/.756 with 3 home runs and 26 RBI.

On September 1, 2019, the Mets selected Sam's contract and promoted him to the major leagues. He made his major league debut on September 4 as a pinch runner versus the Washington Nationals. On December 24, 2019, he was designated for assignment.

Haggerty was claimed off waivers by the Seattle Mariners on January 10, 2020. He began his Mariners tenure with an 8-game hitting streak and ended the season slashing .260/.315/.400 with 4 stolen bases across 13 games.

On April 13, 2021, Sam hit a home run to Eutaw Street at Oriole Park at Camden Yards, becoming only the second Mariner to do so after Ken Griffey Jr. On June 7, 2021, he was placed on the 60-day injured list with right shoulder inflammation. and on October 22, Haggerty was outrighted off of the 40-man roster.

In 2022, Haggerty received a non-roster invite to Mariners Spring Training and began the season in AAA with the Tacoma Rainiers. He was called up to the Mariners from May 22-June 17, and again on June 29. On July 14, 2022, Haggerty hit the Mariners' first inside-the-park home run in fifteen years. His approach as a switch-hitting, all outfield (plus second base) speedster, with hustle and a knack for the big play made him a big part of the 2022 Mariners.

His brash playing style, all-out hustle, speed and personal flair earned him the nickname "Ham Swaggerty" with fans and broadcasting crews.

(excerpted from Baseball Almanac, BR Bullpen & Wikipedia)