Suppan has been more consistent than Lilly, but I'm not sure he's been any better. He definitely has been healthier. With Lilly in the AL, ERA+ is likely the best metric for comparison. Suppan's last three ERA+: 104, 114, 110. Lilly's last three ERA+: 109, 80, 120. Lilly has a higher ceiling, Suppan is more durable. It's a wash as to which one will be better. You're right that it's not really fair to compare Sheets injury to Prior's history. On the other hand, if taking injuries into account, Zambrano easily gets the nod over Sheets. So, Zambrano > Sheets. Suppan and Lilly are a wash. The rest of the Brewers rotation of Vargas, Capuano and Bush could be better than the Cubs rotation of Hill, Marquis, and Prior. On the other hand, if Prior returns to his 2005 form, then the Cubs easily take the edge. In 2005, Prior posted an ERA+ of 116 over 166 IP. In Capuano's best ceiling he only posted an ERA+ of 112. The question then becomes is 2006 indicative of Capuano's performance or a spike season for him. Considering Prior doesn't even need to return to his peak season of 2003 to beat Capuano's peak season. Cap's ERA+ for the past four seasons: 112, 106, 83, 101. Prior's ERA+ the past four seasons: 64, 116, 113, 175. What that shows me is that Capuano is a pitcher who is likely to perform 5-15% above league average. Prior, if healthy, can be expected to perform 16 or more above average. Now the question for Prior isn't ability, it's health. It's a big concern, for certain. But to say Capuano is better than any non-Zambrano pitcher is being dishonest. It's just not true. Now on to Bush and Hill. Bush posted an ERA+ of 102 over 200+ IP last season. Hill posted a 111 ERA+ in 99 IP. Bush has a longer track record for certain as he posted that over a full season, while Hill pitched only 100 major league innings in the majors. Given Hill's minor league success, it's not a stretch, however, to believe he can keep it up. Both pitchers look to be pretty good, but I'd actually give the nod to Rich Hill. Marquis is likely to outperform Vargas as well. While Marquis had an atrocious ERA+ of 73 last season, his full three year line of ERA+ is 73, 103, 113. Given that, I'd expect Marquis to be anywhere from 10% above average to 20% below average. On the other hand, Vargas has been below average in each of his last three seasons. His best ERA+ was 99. Even assuming he might have some improvement left in his game, it's a stretch to think he'll be anywhere above 1-2% above average. He also has a floor about as low as Marquis. When looking at the two staffs, it's really hard to guess which one will be better. If both get best case scenarios, the Cubs are likely better because Prior is just that good if completely healthy. The Brewers have fewer question marks, but if Sheets goes down again, they have less to cover the loss.