Christian and Luke McCaffrey played against each other for the first time on Monday night.
Luke is the youngest of four McCaffrey brothers. Christian is the 49ers' star running back.
San Francisco hosted Washington at Levi's Stadium and stayed unbeaten at 6-0.
He ran for two touchdowns and totaled 117 yards, per USA Today.
After the final whistle, the brothers met at midfield and swapped jerseys.
Their father Ed played 13 NFL seasons as a wide receiver. Their mother Lisa played soccer at Stanford.
Max is two years older than Christian. He played at Duke and now coaches the Chargers' running backs.
Dylan is three years younger than Christian. He played quarterback at Michigan and Northern Colorado.
Luke is five years younger than Christian. Washington drafted him in the third round in 2024.
Christian said Luke was the only brother he had never played with or against.
Ed and Lisa McCaffrey watched both sons. Christian joked they might wear all black.
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