Donovan McNabb says Jason Kelce's legendary Eagles career was truly special -- not only because he solidified his spot in the Pro Football Hall of Fame, but also due to the fact he was able to spend every season in Philadelphia.
The NFL legend spoke with TMZ Sports on the heels of Kelce's retirement announcement this week ... and he said the center did something rare in the City of Brotherly Love -- call it home for the entirety of his career.
McNabb pointed out even fellow greats like Brian Dawkins and Brian Westbrook had to throw on different jerseys before retiring as Eagles .