 BALTIMORE--BUSINESS WIRE--Sinclair Broadcast Group Nasdaq: SBGI today announced the companys Sinclair Cares: Roll Up Your Sleeves campaign in partnership with American Red Cross. The campaign urges Sinclair viewers to help increase U.S. blood supplies by making a blood donation appointment, volunteering time, or providing financial contributions for the cause. The Sinclair Cares: Roll Up Your Sleeves campaign kicked off today, which is World Blood Donor Day, and runs through July 23. D 