SANTA CLARA, Calif. -- As he dressed, alongside NaVorro Bowman, after another dominant San Francisco 49ers' defensive performance that propelled the team to its third straight NFC Championship Game, Patrick Willis looked up."This is the greatest sport there is," the perennial Pro Bowl linebacker said. Bowman smiled and nodded.They are arguably the greatest pair of position players in the NFL.As the 49ers have revisited their glorified past this season under coach Jim Harbaugh, it has been cemented by fierce, take-over defensive play.