Notable for his childhood roles in the 2001 film Life as a House and the 2002 ABC television movie Home Alone 4, Weinberg is also known for his recurring roles on the television shows Line of Fire and 7th Heaven.
When he was just six years old, he appeared in episodes of Chicken Soup for the Soul and Oh Baby.
He and Aidan Quinn were both in the cast of the 2002 film Stolen Summer.
His older brother, Matt Weinberg, also had a career as a child actor. The Weinberg siblings appeared together in the 2002 movie Spooky House.
He shared the screen with Kevin Kline and Kristin Scott Thomas in the film Life as a House.