Former San Francisco 49ers tight end Delanie Walker remembers a 2012 training camp practice beginning as practice always had -- until coach Jim Harbaugh called the team to midfield.

"We thinking, 'Oh yeah, he's about to cancel practice,'" Walker said. "'We going to go to a water park or something.'"

Harbaugh began speaking to the team about its NFC West rivals. The Seattle Seahawks were at an amusement park, Harbaugh told the team. The St. Louis Rams and Arizona Cardinals were also enjoying a day off, he said. "Guess what the 49ers are going to do today?" Harbaugh asked.

They would practice -- intensely. At least a hundred plays: "Everybody else takes breaks, the 49ers don't," Harbaugh said.

"Everybody was kind of pissed that day," Walker said while laughing.

This was the Ji

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