Team spread anti-knife crime message.
The U's squad gave their support to the campaign after hearing of the tragic news of the death of local teenager Jay Whiston, who was stabbed at a house party in September.
U's player Karl Duguid said: "We need to make people aware of this campaign. Knife crime is a very big concern and it's become a real problem.
"We're trying to stop this from happening and as footballers, we're in the public eye, so want to promote this as much as possible."
The campaign has already collected thousands of signatures as Jay's family look to promote awareness of the dangers of carrying knives.