Last season, Minnesota rebuilt its offensive line with the additions of LT Riley Reiff and RT Mike Remmers. The Vikings also drafted Ohio State's Pat Elflein to play center. Eflein, now in his second season, will quickly become one of the better centers in the NFL. If there is a question on the Vikings' offensive line, it's at guard. The potential starters are Nick Easton and Danny Isidora, but the Vikings signed ex-Bear Tom Compton, who could figure into one of the starting positions. Second-round rookie, Pitt product Brian O'Neill, figures to be the top tackle reserve, and he will eventually challenge for a starting spot. On defense, the Vikings return one of the best units in all of football.