Vargas, who was a near-lock for a starting rotation spot behind Ben Sheets and Jeff Suppan, pitched well this Spring, posting a 3-1 record with a 3.86 ERA and seemed to be poised to improve on the mediocre 2007 he posted.
With lefty Chris Capuano likely out for the season with a torn ligament and impending Tommy John surgery, the rotation will now feature Sheets, Suppan, Dave Bush, Carlos Villanueva, and Manny Parra to start the season.
Upon Yovani Gallardo's return, however, the rotation will likely change, with either of the latter trio to be relegated to bullpen duties.
I'll have much more on the Brewers coming up in my season preview. It's been too long.