Manager Alex Cora said Saturday that Anthony will serve as the Red Sox's main leadoff hitter to begin the regular season, Christopher Smith of MassLive.com reports.
Kemp (kneecap, shoulder) will start in left field and bat cleanup in Saturday's Grapefruit League opener against the Blue Jays, Lochlahn March of The Philadelphia Inquirer reports.
Garcia will "100 percent" not be ready for Opening Day as he continues to recover from surgery on his right elbow from last September, Shi Davidi of Sportsnet reports.
Cardinals manager Oliver Marmol said Friday that O'Brien will be shut down for a few days due to a mild right calf strain, Brian Murphy of MLB.com reports.
Westburg will be sidelined at least through the end of April due to a partially torn UCL in his right elbow, Matt Weyrich of The Baltimore Sun reports.