Isaac Cossier is a 20-year-old professional football player from FRA. He currently plays for Le Mans, wearing the number 3 shirt. He plays primarily as a Defender. His current market value is estimated at 1000K €.

His most recent move was a Loan from Le Mans to LOSC Lille on 2026-06-30.

Throughout the French Ligue 2 2025-2026, Isaac Cossier featured in 21 matches, averaging 1.2 tackles, 1 interceptions, and 2.7 clearances per game, while blocking 0.1 shots per game.