Derek and Gabriella said in a joint Instagram post this week. "Welcome to the World Bella!!! ️" Derek's brother, NFL legend JJ Watt, commented.

Derek, a former University of Wisconsin and NFL fullback, and Gabriella welcomed their "sweet little girl," Isabella Grace — their first daughter — into the world in April.

With the birth of Derek and Gabriella Watt's third child, the Watt brothers and their families officially have enough members — 11 — to field a full team.

Pittsburgh fullback Derek Watt celebrates a Steelers fumble recovery against the Cincinnati Bengals during their game on Nov. 15, 2020, at Heinz Field. Watt and the Steelers won the game, 36-10 ...