Continuing to put Chris Leben in the UFC octagon could be dangerous. But keeping him out of it could be doubly so. That’s the conundrum UFC President Dana White currently faces. Leben (22-10 MMA, 12-9 UFC) suffered a split-decision loss to fellow middleweight Andrew Craig (9-1 MMA, 3-1 UFC) on Saturday at UFC 162 in Las Vegas (though it should have been a unanimous-decision loss). It marked his third consecutive defeat and his fourth in his past five fights. Like most of his bouts, Leben absorbed an inordinate amount of blows to the head, but he kept fighting through it. Earlier in his career, the remarkably durability was kind of exciting, and it’s made him a fan favorite. But for White, it’s becoming a reason for worry