If we're talking about stuff he was in other than Friends, he had a short run on Growing Pains where he played Carol's boyfriend and ended up dying in a drunk driving accident. That episode always stuck with me even before I knew who he was.
https://youtu.be/TqX2zKA0DOo?si=wTH_rknP3KXcAuZN
https://youtu.be/4gGasjWuJlM?si=-4Rb8yzfK2_D1hh2
This all hits differently for me now.
https://imgur.com/WqDcNNq
https://imgur.com/89Z5jrB