Rob Calonge Cal's offensive line is undergoing another transformation this offseason even though the only starter from 2009 who left was Mike Tepper. That's how important the role of a left tackle is. The two frontrunners for that job is Matt Summers-Gavin, who started at left guard last season, or Mitchell Schwartz, who was the starting right tackle. Schwartz also started at left tackle 10 games in 2008, which helps put him in good shape of doing it again in 2010. Listed at 6'6" and 331 pounds, Schwartz is the prototypical size for the left tackle position. Summers-Gavin, who also has the talent to perform at a high level as a left tackle, is just 6'4" and 290 pounds in comparison -- a size better suited to the right tackle spot or the guard position he held in 2009. What's great for...

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