I used the Lineup Analysis tool at Baseball Musings: http://www.baseballmusings.com/cgi-bin/LineupAnalysis.py If you take the Cubs splits from 2007 for the 2nd through 9th spots in the order and plug in Soriano's numbers in the leadoff spot, you get 4.712 runs per game, which equals 763 runs over the course of a 162 game season. It's not that far off considering the Cubs scored 752 last year. If you take the same splits for the Cubs but substitute Roberts' numbers for Soriano's, you also get 4.712 runs per game. Probably a bit of a crude method, but to me it shows that a .377/.432 line out of the leadoff spot is not going to yield a significant number of runs over what a .337/.560 line would, even if you factor speed into the equation. So what do you get when you plug Roberts into the leadoff spot and plug Soriano's numbers into the 2 thru 9 position? My response was to his claim that Soriano only scored more runs due to a superior lineup. I used the Lineup Analysis tool to show that there isn't much of a difference between Soriano leading off and Roberts leading off. Soriano's clear advantage in slugging pretty much makes up for Roberts' advantage in OBP. The question remains, would Roberts leading off and Soriano in the middle of the order be better than Soriano leading off and Roberts batting second? Probably, but I doubt the difference between the two lineups would be very big. I think it would be a nice dilemma to have. I know Sorianio's numbers have been a little better from the leadoff spot and this could be debated forever. If he hits 40 homers from the 4-6 spots he's going to have more RBI's than if he hits 40 homers while batting leadoff. I guess it depends on whether you believe he'll hit worse from down in the order. Personally I think if he was moved down and left there he would be a force and I would not mind seeing him hit between Lee and Aram. Pitchers would have to throw hittable pitches to one of them. If we don't get Roberts, and I don't believe we will, I'd leave him in the leadoff spot because without Roberts there is no one else nearly as good at it as he is. This is all just an opinion though. No sources to prove any of it. There's a good article on BP right now explaining how dumb it is batting Soriano leadoff. It's free also. http://www.baseballprospectus.com/article.php?articleid=7184