The Mets Concert Series is back! Foreigner (June 14), Nas (July 19), O.A.R. (August 2) and Third Eye Blind (August 23) will headline the Friday night post-game shows at Citi Field. Admission is included in the price of a game ticket. Tickets to the Mets Concert go on sale tomorrow, Friday, March 1 at 10:00 a.m. at Mets.com and (718) 507-TIXX.