The son of a Boston Red Sox broadcaster has pleaded guilty to murder in the stabbing of his girlfriend last year.

Jared Remy entered the plea Tuesday in Middlesex Superior Court in Woburn, Mass. Prosecutors say he fatally stabbed Jennifer Martel at the couple's apartment in August.

The judge didn't immediately accept Remy's guilty plea to first-degree murder, assault and battery, and violating a restraining order, among other charges.

Jared Remy, 35, was arrested Aug. 13 after he allegedly pushed the 27-year-old Martel into a mirror. He was released on his own recognizance Aug. 14 and stabbed Martel the next day. He also pleaded guilty to assaulting a man who tried to help Martel as he was stabbing her.

Remy is the son of Jerry Remy, a popular Red Sox announcer.