Lloyd Sam was unaware of the scale of the problem and wanted to help
A nationwide search including Leeds has been launched for black and mixed race blood donors.
Currently less than one person in 100 donating blood is black and efforts to increase this number are being made.
The campaign includes a Leeds United player who's been doing his bit to help.
The session also gave blood donors the chance to register as bone marrow donors if they have not already done so.
Leeds United winger Lloyd Sam went to the blood donor centre on the Headrow to try and get more people from African Caribbean backgrounds to consider giving blood and going onto the bone marrow register.
It was part of Daniel De-Gale Blood Donation Week.
Sam admitted: "I definitely wanted to get involved and raise the awareness. I didn't know it was such a big problem."
Craig Taylor from the NHS said donating blood was a simple process and explained the point of the appeal: "We need everybody to give blood all the time... but the reason we are particularly appealing for African Caribbean donors to come forward is that about 20% have B group blood, there's a much lower proportion (of B group) in the rest of the population.
"The African Caribbean population is also under-represented on the bone marrow register."
The campaign is named in memory of Daniel De-Gale. He was a young man who died of Leukaemia in October 2008 and he relied on blood donations during his short life.
His parents founded the Afro-Caribbean Leukaemia Trust (ACLT) in 1996 after facing difficulty trying to a find bone marrow donor for their son.
Due to the
charity's work to uphold Daniel's legacy thousands of blood donors and around 32,000 people of black and minority ethnic origin have already been added the to UK bone marrow registers to improve the chance of finding a life saving bone marrow match.
Most people can give blood and it is a very simple process. If you are generally in good health, age 17 to 65 (if it's your first time) and weigh at least 7st 12Ib you can donate. You can give blood approximately every four months. See