After two league changes, the expansion indoor football team knows it will play in the National Arena League. They know they’ll play in the Holmes Center, that their training camp begins Feb. 28 and their first game is at the Georgia Firebirds, who play in Albany, Ga., on March 18. The Grizzlies got their first look at the field they will play their first home game, a March 25 showdown with Lehigh Valley, when the franchise held an open house at the Holmes Center.