The Red Sox traded Asuaje and three other prospects to the Padres on Friday for Craig Kimbrel, Jon Heyman of CBS Sports reports.
An 11th-round pick in 2013, Asuaje made the jump to Double-A as a 23-year-old last season and saw a significant drop in production. He turned in a .251/.334/.374 line after slashing .310/.393/.533 between Low-A and High-A the year before, though Asuaje did actually improve his strikeout rate from High-A and maintained a walk rate close to 10 percent.