I have absolutely no idea how Maroth had the ERA he did last year. Look at the peripherals of Maroth and Marquis last year: Maroth-1.491 WHIP, 4.02 K/9, 2.68 BB/9, 1.84 HR/9, .295/.346/.521 Marquis-1.523 WHIP, 4.46 K/9, 3.47 BB/9, 1.62 HR/9, .289/.359/.509 So Marquis's peripherals may have been slightly worse-yet Maroth ended up with a 4.19 and Marquis had the 6.02, which is a lot more difference then should have been. Now compare it to Maroth this year: 1.66 WHIP, 3.21 K/9, 3.79 BB/9, 1.72 HR/9, .319/.384/.563 So Maroth has a 5.06 ERA this year, but every peripheral is worse than last year for Marquis. I don't think Maroth is any better than Marquis whatsoever, and is probably a little worse at this point.