Tom Brady's ex-teammate Cassius Marsh talks QB's career, theorizes why he may not be done with football

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Cassius Marsh got a taste of what it was like to be teammates with Tom Brady.

The defensive lineman played for the New England Patriots for nine games during the 2017 season before he was waived and acquired by the San Francisco 49ers.

Even in the short amount of time he was with the Patriots, he told Fox News Digital he could "absolutely" see why the legendary quarterback is considered to be the greatest of all time.

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"Just playing with him and having him be my quarterback for the 10 weeks I was with the Patriots, it’s pretty incredible just the confidence that the team has in him, just pulling through and making something happen. It was actually a very unfamiliar feeling," Marsh told Fox News Digital from inside his Cash Cards Unlimited store in Westlake Village, California.

Cassius Marsh #55 and Trevor Reilly #49 of the New England Patriots signal for a safety during the second quarter of a game against the Los Angeles Chargers at Gillette Stadium on Oct. 29, 2017, in Foxboro, Massachusetts. (Maddie Meyer/Getty Images)

Marsh spent his first three seasons with the Seattle Seahawks and had Russell Wilson as a teammate, but he said there was just something different about Brady.

"To have somebody like Brady who has done it so often, won so many championships and just the way that he practices, the way that he prepares is just so calculated, Marsh said. "Everybody on the team respects him and has a lot of love for him. He was an extremely down-to-earth person, had conversations with everybody. I've never heard a person say a bad thing about Tom. He's just, he's