By Matt Hladik After turning in promising results in limited duty in 2020, expectations were high for Clemson’s DJ Uiagalelei heading into last season, his first as the Tigers’ starting quarterback. Instead of meeting those projections, however, Uiagalelei struggled as a sophomore, completing less than 56% of his passes while throwing 10 interceptions and only nine touchdowns. Coming off a “down” 10-3 campaign, Clemson will need Uiagalelei to show marked improvement this fall in order to get back among college football’s elite. The former five-star recruit is hoping the lessons he learned last…