Matthew Brian Fleishman (born June 29, 1990), musically known as Format, is an American rapper, songwriter, and former professional baseball player. He is currently known for his musical work since 2017, releasing singles with Bentley Records.

Matthew was born on June 29, 1990, in Manhasset, New York. At the age of 8 he started taking piano lessons and eventually began to teach himself popular classic rock and hip hop songs by ear. He also became very competitive at sports, primarily baseball. He graduated from Commack High School in 2008 where he lettered in baseball and received All-County and All-League honors.

After his freshman year at Western New England College, Fleishman transferred to Villanova University. In his first two seasons at Villanova, Fleishman started 84 games and batted .307 with eight home runs and 67 RBI.

His senior year at Villanova he hit .320 with 5 home runs and 42 RBI. At the end of the season Fleishman was selected to the All-Big 5 Team and the All-Big East First Team. Fleishman graduated from Villanova University in 2012 with a Bachelor of Science in Mechanical Engineering degree. He then went on to earn a Master’s degree in Computer Science at Stony Brook University in 2015.

After not being drafted in the Major League Baseball draft, Fleishman signed a professional contract with the Long Island Ducks of the Atlantic League of Professional Baseball on June 29, 2012.

In late 2015, Format began to rap and play the piano in his spare time. The following year, he began to produce music with some of his close friends. They mostly created short concepts using keyboards and real instruments. Format began to rap over their productions and started to write lyrics to various instrumentals. He would write, memorize, record, and play back the audio to improve and develop his skill. In early 2017 he wrote his first complete song “Jungle” which was released to SoundCloud on March 4, 2017.

On August 10, 2017, Format signed to Bentley Records. He released 5 songs with Bentley: "Hold On," "No Entry," "Stars," "Doubts," and "Lane."

On August 10, 2018, Format decided to end his contract with Bentley Records and remain unsigned to focus on creating new music, including his upcoming debut EP, “Reformatted.”