He played Will Colbert who co-founded the "I Hate Rachel Green Club."

Ross mentioned their names when he was comforting Carol before her wedding.

Monica mentioned the dog again at her parents' anniversary to try to get the guests to cry.

Phoebe moved in with him for one day, but she broke up with him after he shot a bird.

Chandler and Monica both mentioned this fact about their trip to New Jersey, causing Joey to get suspicious.

Joey managed to make the happiest dog on Earth sad.

"I want to see how this bad boy turns out."

"No offense, but your place has a weird smell."

Monica came home and discovered that Rachel, Phoebe, and Chandler found the presents. She then revealed that she got him a water purifier.

Ross convinced Chandler to let him win so he could impress Mona.