Although Le'Veon Bell and Antonio Brown dissected Miami's defense throughout a dominant Steelers first half, Moore was driving for a chance to trim Pittsburgh's lead to one score at the half. When Moore dropped back from the eight-yard line on first-and-goal, Harrison streaked past left tackle Brandon Albert to blindside the quarterback, forcing a back-breaking fumble that short-circuited the Dolphins' comeback hopes.
"It was just a good disguise," coach Mike Tomlin said after the game. "That's just the savviness of a guy like James. He showed coverage and rolled down late and came off the edge and was unblocked because of it."
Harrison finished with 10 tackles, 1.5 sacks and two quarterback hits in a dominant showing. While the Steelers pounded out 179 yards and a pair of touchdowns on 35 carries, Ajayi was rendered a non-factor -- held 171 yards below his Week 6 performance that turned him into a household name.
"He is a peculiar leader because he's somewhat unassuming and he doesn't have a lot to say," coach Mike Tomlin said of his 38-year-old star, "but his actions speak volumes."
With Harrison channeling 2008 NFL Defensive Player of the Year form, a Pittsburgh pass rush that managed a league-low 13 sacks in the first 10 games leads the NFL with 30 since Week 11. While the offense's acclaimed "Killer Bees" garner most of the hype, the defense ranks in the top five in every major category during the eight-game winning streak.