ATHENS — Today is the deadline to get an early registration discount for running in the fourth annual Kevin O’Sullivan Classic 5K race to be held March 17 on the Concord University campus and the streets of Athens. Registration is $25 through today, and that cost includes a long-sleeved technical race shirt. From Jan. 16 through March 15, registration is $30, and the cost is $35 on the day of the race. To register, go to https://www.webscorer.com/register? raceid=119945. The race supports the Five Aces Scholarship at Concord.