This is tough, but I think I go with Stewart this week. DWill is going to get most of the touches, but Stewart is going to get somewhere between 8-15 carries, most likely. Based on last year's production, you're looking at about a 50% chance of at least 1 TD and like 70 yards, and 50% he'll get like 35 yards. For Derrick Mason, you're probably looking at something around 4 receptions for like 65 yards, but it's unlikely he'll get a TD.
I'd go with Stewart, he has the higher ceiling and you're only giving up about 3-4 points to Derrick Mason if Stewart busts. But his upside is a lot higher and he could rack up a couple TDs. He had a toe injury coming into the year last year as a rookie and still started the year off on a tear, for 130 yds and 2 TDs in his first 2 games, so I don't think his achilles injury is something to worry about now that he's back.
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