The San Andreas Magnetics is a sports team in Grand Theft Auto V.
The Magnetics are probably a professional football team, likely based on the San Diego Chargers, as their names both have to do with electrons. Their team colors are black, green, white and gold.
The logo and colors are similar to the Oakland Athletics.
In GTA Online, players who signed in on 23 October 2015 received a Magentics cap. Players who signed in on 17 November 2015 received a separate Magnetics Block Fitted Cap.