DeAngelo Williams' project to purchase 53 mammograms for women in Charlotte and Pittsburgh -- the number honoring the age of his mother, Sandra Hill, when she died of breast cancer in May 2014 -- is off to a productive start, with the help of some teammates.

Several Steelers wore a pink T-shirt with "Pittsburgh in Stronger than Cancer" in white letters on the front.

Steel City Cotton Works connected with Williams, who let the company into the locker room to provide players with shirts. "If the NFL won't let De'Angelo Williams wear pink all season to honor his mom, then we will," the company says in the ad. "Buy this shirt and all proceeds will go to fund De'Angelo's free mammogram initiative. De'Angelo has committed to pay for 53 mammograms, but we are hoping this shirt will pay for 100. In Pittsburgh, we are family."

James Harrison rocking a Breast Cancer T-shirt -- "Pittsburgh is Stronger than Cancer" - in support of DeAngelo Williams. A photo posted by Jeremy Ryan Fowler (@jfowlerespn) on Oct 19, 2015 at 9:12am PDT

I spoke with Brandon Grbach, the owner and creative director of the company, and here's how he collaborated with Williams:

"I had the idea on Wednesday when I saw the NFL wouldn't let him wear pink all season long. And I lost my grandma three years ago to breast cancer, so it really provoked me to do something. So I said if De'Angelo can't wear pink, Steeler Nation will wear it for him. And I designed the tee on Wednesday afternoon, and sent him a DM and he got right back to me and asked me to bring the whole team tees. So we gave the tees to the team, but since this morning we've almost sold $10,000 worth of tees. How amazing is that??"

Pretty amazing.

The NFL has notified Williams he can't wear pink accessories on his uniform outside of the month of October. So, Williams decided to color the tips of his hair pink to honor his mother.