Around the Horn: 'Layers of quality' in Marlins' bullpen

Spring Training for the Marlins gets underway with pitchers and catchers workouts beginning on Feb. 14 at Roger Dean Stadium in Jupiter, Fla. As the countdown continues, MLB.com is taking a position-by-position look at how Miami's 2017 squad is shaping up. This is the second in a multipart Around the Horn series that will run periodically until camp starts. Today's focus: the rotation.