The Red Sox agreed to trade Guerra and three other prospects to the Padres on Friday for Craig Kimbrel, Jon Heyman of CBS Sports reports.
Showing impressive pop to go along with advanced defense at short, Guerra clubbed 15 homers and slugged .449 from the left side in 116 games at Low-A Greenville in 2015. He's an impressive prospect and there's a glaring need at the position in San Diego, but Guerra just turned 20 in September and it's unrealistic to think he will be an option for the major league team in 2016.