Ciman was reportedly not informed about the trade ahead of time from his previous team, Montreal Impact, and was left "shocked" by the deal, according to his agent.
ESPN shared comments that agent Jean Russo made on a radio show this week.
"That chat was a real kick in the teeth," Russo said. "Laurent and [his wife] Diana were shocked – they didn't sleep the whole night.
"His first reaction, in the heat of the moment, was: 'We let everything go!' That's why he didn't want to speak to the media immediately.
"After a night's sleep, he said to himself that he would keep the house and come back here."
Ciman, 32, spent three seasons in Montreal, winning MLS Defender of the Year honors in 2015. After the apparent shock wore off on the trade to expansion side LAFC in exchange for Jukka Raitala and Raheem Edwards, Ciman tweeted to his new teammate, Walker Zimmerman, and seemed ready to take on the new challenge.
me too but do not worry ... we will work very hard to become the best central defense of the league and to have a lot of fun— Laurent Ciman (@LaurentCiman23) December 13, 2017
Ciman also tweeted out a note to Montreal fans on Thursday, sharing his warm memories of his time in the city.
Lettre à mes partisans .... pic.twitter.com/pIYsBjVAdJ— Laurent Ciman (@LaurentCiman23) December 14, 2017