Billy Rayshun Hamilton (born September 9, 1990) is an American professional baseball center fielder for the Charros de Jalisco of the Mexican League.

The Reds selected Hamilton in the second round of the 2009 Major League Baseball draft, and he made his MLB debut in 2013.

[12] After the 2012 season, the Reds announced that Hamilton, who originally played shortstop, would move to center field for 2013.

Bill Bavasi, the Reds' vice president of scouting and player development, told MLB.com that the move was made for several reasons, including the fact that two other established shortstops, Zack Cozart and Didi Gregorius, were already on the roster.

[16] Hamilton appeared in four major league games as a pinch runner until September 10 when, in the seventh inning, he replaced Shin-Soo Choo in center field and also made his batting debut, going 0-for-2 in a loss at home to the Chicago Cubs.

Playing center field and batting ninth, in his first at-bat of the game he notched his first Major League hit, a second-inning double to left field off Astros' starter Brad Peacock, and later got his first run batted in, driving in Todd Frazier with an infield single.

[23] By around the time of the All-Star break, however, Hamilton's stats had greatly improved and he was attracting positive attention from a number of sources, tipped as a potential Gold Glove candidate for defense[24][25] and also noted for unexpected power hitting.

Despite this, Hamilton was second in Major League Baseball for stolen bases at the time, with Dee Gordon having recorded 58.

[27] On October 23, Hamilton was nominated for the 2014 Gold Glove for National League Center field,[28] but lost to Juan Lagares of the New York Mets.

[29] Hamilton also finished second in NL Rookie of the Year voting, losing out to New York Mets pitcher Jacob DeGrom.

[30] At the opening of the 2015 season, Hamilton joined Vince Coleman (1987) as the only players in Major League Baseball history to steal six bases in their team's first three games.

[35][39] In 2018, Hamilton led all NL outfielders with 12 assists, but struggled offensively all season, hitting just .236/.299/.327 with 132 strikeouts while going 34/44 in stolen base attempts.

[41] Reds general manager Nick Krall said he tried to trade Hamilton, but there was no interest on the part of other teams.

On September 3 during a Subway Series with the New York Yankees leading the Mets 7–6, Hamilton replaced Jeff McNeil as a pinch runner at the bottom the ninth inning.

[55] On March 16, 2021, Hamilton signed a minor league contract with the Chicago White Sox organization.

[57] On May 29, Hamilton hit his first White Sox home run off Baltimore Orioles pitcher John Means.

[58] On December 16, 2022, Hamilton signed a minor league deal with the Chicago White Sox organization.

He began the 2023 season with the Triple-A Charlotte Knights, playing in 17 games and hitting .188/.328/.271 with no home runs, two RBI, and three stolen bases.

Hamilton was placed on the injured list with a left hamstring strain on May 10,[64] and began a rehab assignment on June 6.

[67] On August 30, 2023, Hamilton signed a minor league deal with the Tampa Bay Rays organization.