Mamadou Billo Diop works hard during an MLS NEXT Pro playoff game for Colorado Rapids 2. Photo Credit: Spencer BaldwinCommerce City, Colo.- Colorado Rapids have signed Mamadou Billo Diop to an MLS contract, the club announced Saturday. Read More: Mamadou Billo Diop: The Best Colorado Rapids 2 player you’ve never heard of. “Billo has impressed in his training exposure with the first team,” said Colorado Rapids Head Coach Matt Wells. Billo Diop plays during a Colorado Rapids 2 game in MLS NEXT Pro during the 2025 season.