By Alek Arend The Pittsburgh Steelers are keeping things in the family. On Saturday, the storied NFL franchise officially signed a brother of an NFL star. The Steelers have officially signed fullback Connor Heyward. He’s the younger brother of Steelers linebacker Cam Hayward. The AFC North franchise took Connor in the sixth round of the 2022 NFL Draft. He played fullback and tight end in college at Michigan State. The former Spartan caught 35 passes for 326 yards and two touchdowns last season. Here’s what the Steelers have to say about their new rookie, via Steelers.com: The Steelers signed t…