Chris Humphreys/US PresswireMark EllisIt's natural to compare infielder Mark Ellis, whom the Dodgers are reportedly about to sign to a two-year contract, to Jamey Carroll, who recently completed a successful two-year contract with the Dodgers and just left to start another with the Twins.The comparison isn't necessarily a favorable one based on recent performance – Ellis delivered only a .288 on-base percentage and .346 slugging percentage this season despite playing half his year with Colorado, while Carroll was at .