Jon Singleton (baseball)

Jonathan Lee Singleton (born September 18, 1991) is an American professional baseball first baseman who is a free agent. He has previously played in Major League Baseball (MLB) for the Houston Astros and Milwaukee Brewers.

Singleton grew up in Long Beach, California, and was drafted by the Philadelphia Phillies in 2009. He was one of several prospects traded to the Astros in exchange for Hunter Pence in 2011. He signed a $10 million contract with the Astros before making his MLB debut in 2014, but he struggled, last playing for the Astros in 2015 before they relegated him to the minor leagues and released him in 2018.

After playing in the Mexican League, Singleton signed a minor league contract with the Brewers, for whom he returned to the major leagues in 2023.

Singleton played baseball at Millikan High School in Long Beach, California. He committed to play at California State University, Long Beach a few months before the 2009 Major League Baseball draft.

The Philadelphia Phillies drafted Singleton in the eighth round, with the 257th overall selection, of the 2009 Major League Baseball draft. He had been projected for selection as high as the second round of the draft, but his senior year statistics caused him to fall. Singleton reported to the Gulf Coast League Phillies, where he played 31 minor league games that year. He spent 2010 with the Single-A Lakewood BlueClaws, where he hit for a .290 batting average, 14 home runs and 77 runs batted in (RBI).

Prior to the 2011 season, Singleton was considered the Phillies' second best prospect by Baseball America.

On July 29, 2011, the Phillies traded Singleton, Jarred Cosart, Josh Zeid, and Domingo Santana to the Houston Astros in exchange for Hunter Pence. Baseball America designated Singleton as Houston's top prospect following the 2011 season. He was named to appear in the 2012 All-Star Futures Game.

Singleton tested positive for marijuana in June 2012. He competed in the Arizona Fall League that offseason, and had a second positive test for marijuana in December. On January 9, 2013, Singleton was suspended for 50 games due to his second failed drug test. Singleton said that he had grown up around friends who used the drug and that he had been using it "on and off" since he was 14 years old. He spent a month in a rehabilitation center after the second failed test.