Sondra Williams, the wife of San Francisco 49ers tackle Trent Williams, said on social media that their son, Trenton, was stillborn on November 24.

Heartbreak has struck the 49ers family again with the news that the newborn son of left tackle Trent Williams died on Nov. 24. Sondra Williams, the wife of the 49ers’ tackle, said in an Instagram post the baby had been diagnosed with Trisomy 13 — a rare genetic condition — and that a twin daughter had been lost earlier in the pregnancy.

San Francisco 49ers left tackle Trent Williams and his wife, Sondra, announced the stillbirth of their son, Trenton O’Brien Williams Jr., in an Instagram post on Sunday. Trenton Jr. was born at 35 weeks on Nov. 24. His twin died earlier in the pregnancy, Sondra said.