KANSAS CITY, Mo. (AP) — For a guy who with three strikes against him, defensive end Wallace Gilberry is making quite a splash in Kansas City.First, he bears the stigma of coming into the NFL as an undrafted free agent. Guys drafted in the first round have to prove they can’t play. Undrafted free agents must prove they can.Secondly, he was brought in for a 4-3 defense, and now the Chiefs have installed a 3-4.Most critically, he’s just not very big in a world that favors mammoth.At 6-foot-2 and 260, Gilberry might be a giant in the checkout line.