Jamar Austin, (born January 16, 1980), who records under the mononym Sacario is an American rapper and songwriter best known for writing the song If I Could Go for Angie Martinez. Billboard (magazine) named the song among the biggest songs of the year in 2002. It was featured on Totally Hits 2002: More Platinum Hits which is Certified Platinum by the RIAA with sales of over 1,000,000 copies.

His first record release "Live Big (Car Keys)" (2002) and "If I Could Go" were both included on The Transporter movie soundtrack. In the first ever deal of its kind EA Trax packaged "If I Could Go" with NBA Live 2003 Video Game Soundtrack. The soundtrack sold 1.3 Million copies worldwide and is inducted into the Guinness World Records as the "first officially-released video game soundtrack to be RIAA certified platinum". According to Guinness World Records, NBA Live 2003 Soundtrack went Platinum in 6 months. In 2004 MTV announced his nomination in the Mixtape Artist of the Year category at The Annual Mixtape Awards.