Three people attempted to break into Kenta Maeda's L.A.-area home Sunday night, but fortunately for the star MLB pitcher, his alarm system thwarted the suspects before they could get in.
Law enforcement sources tell TMZ Sports ... at around 7:19 p.m., three people smashed in windows at Maeda's Santa Monica residence, trying to gain entry to the place.
But, we're told the trio was NOT able to get into the home ... after they were scared off by a home security system.
We're told the alarm company notified cops ... and it appears nobody was home at the time of the attempted break-in.