Welcome to a free-agent signing period that figures to be unlike any other for the Seattle Seahawks. The Seahawks over the past decade have often been something of an afterthought team in free agency, spending most of their money on re-signing their own players and waiting until the second or third phases to try to fill a few needs by bargain hunting. But this time, the Seahawks not only have more cap space than all but one other team but also an obvious need at the game’s most important position — quarterback. Unless, that is, you buy that they really think Drew Lock can be the answer. If the…