The flu bug making its way through the clubhouse is all but a rite of spring. Right fielder J.D. Drew didn't play on Saturday for that reason.
Lester will likely get his work in on the backfield in the next couple of days and then take his turn in the rotation next time out.
"We'll let him have a little simulation and then we'll get him right back on his day," said manager Terry Francona. "It's probably going to run its course. Guys are going to get it and get sick."