When Adrian Peterson returned to his home in Statesboro, Ga., after work one day last month, the former Bears running back discovered a special package waiting for him on his front step.

Much to Peterson's delight, the navy and orange commemorative box adorned with a Bears 100 logo contained one of the No. 29 Bears jerseys he had worn during his career with the founding NFL franchise from 2002-09.

On his Facebook page, Peterson posted a :45 video of him opening the box and displaying the jersey and wrote: "Yes sir! Thanks @ChicagoBears, one of the best organizations in the NFL!"

Peterson told ChicagoBears.com that receiving the gift put a smile on his face and brought back unforgettable memories of his time with the Bears. 

"It was unique that they were able to actually find one of my game-used jerseys," Peterson said. "That was even more special about getting it." 

In celebration of their 100th season, the Bears are sending game jerseys to their former players—the actual jersey that player wore during his time with the team if possible. They're in the process of shipping nearly 600 jerseys and hope to eventually send about 500 more.

Former Bears receiver Marcus Robinson also posted a short video on his Facebook page of him opening his box and displaying his old No. 88 jersey. He ends the clip by saying, "Go Bears, baby!"

"It's a really awesome thing they're doing for us," Robinson, who played for the Bears from 1998-2002, told ChicagoBears.com. "I'm really grateful about it. Reading the letter [that accompanied the jersey], they're trying to reach out to everyone who has played for the Bears organization."

Peterson and Robinson are among several former players who have expressed their gratitude to the Bears for the jerseys on social media.

On Facebook, former offensive lineman Roberto Garza posted a photo of his old No. 63 jersey with his name on the back that he received and wrote: "It was honor to play for the @ChicagoBears and thank you for the gift."

On his Twitter account, former receiver Earl Bennett wrote: "Thank you @ChicagoBears for the surprise package. Truly a first class organization."

Former offensive lineman Steve Edwards wrote on his Twitter account: "It's all love for the Bears alumni. @ChicagoBears always looking out."

Here are some of the social media posts: