Ada, who was born last month, passed away last week, his current club Warrington have revealed in a statement.
“Our thoughts are with Dom, Megan and his family at this difficult time,” it read.
A minute’s silence will be held ahead of the Wolves’ match with Hull FC today.
Players will also wear black armbands as a mark of respect.
Prop Crosby, 26, joined Warrington in the off-season after six years with hometown club Wigan. His last match in the Cherry and White was last October’s Grand Final triumph.
“Our sincere condolences to Dom and Megan,” said a statement by the Warriors. “You are in our thoughts at this time.”