Contreras (illness) will start at first base and bat fourth against the Athletics on Saturday, Chris Cotillo of MassLive.com reports.
Contreras missed the Red Sox's last two games while fighting off an illness, but he appears to be feeling well enough to return to action Saturday. The 34-year-old has remained hot since the All-Star break, slashing .306/.485/.531 with three homers, nine RBI and 11 runs scored over his last 17 games.