The San Francisco 49ers and Seattle Seahawks have, by some accounts, carried their NFC West rivalry into the offseason.When one team would make a high-profile move, the other would seem to have a move of its own ready.2012 Michael Crabtree vs. Anquan BoldinThe parallels have taken an unfortunate turn recently, with bad news visiting these Super Bowl contenders.Less than a week after the Seahawks learned they would lose defensive end Bruce Irvin to a four-game suspension, news broke Wednesday that the 49ers' leading receiver, Michael Crabtree, suffered an apparent torn Achilles' tendon during practice.