Marmol has a fine ERA for about 8 weeks. That's not the same as pitching fine. 19 IP, 19 K, 12 BB, 12 H, 1 HR That's about a 3.75 FIP from my back of the envelope math. Not awesome, not worth "WHY IS HE ON THE ROSTER" hand wringing. 3.75 FIP is good for the season as a whole, not as the highlight of the best stretch of his season.