TERRY Bradshaw was in hysterics during Fox NFL Sunday after Rob Gronkowski's strange explanation of a family tree.

The Pittsburgh Steelers legend was alongside Gronk and the rest of the Fox NFL Sunday crew during the Week 3 edition of the football pregame show.

Bradshaw, Howie Long, Strahan , and Gronk were tasked with analyzing a respective Week 3 matchup.

Gronkowski spoke about the Arizona Cardinals-San Francisco 49ers division matchup as both teams were 2-0 entering Sunday.

The 36-year-old shared his "three keys" for the Cards to beat the 49ers.

Gronk's last key was for quarterback Kyler Murray to get the ball to second-year wide receiver Marvin Harrison Jr , who entered Sunday with just seven receptions combined in two games.

"Marvin Harrison Jr. needs to be implement

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