The All-Star outfielder, who took batting practice before the Red Sox faced the Twins, apparently elected to start serving the penalty because of soreness in his right hand.
Everett hurt himself while punching a bat rack following the ejection that led to his suspension. He is batting .316 and leads Boston with 26 home runs and 75 RBIs.
Everett was suspended last week for twice bumping home plate umpire Ronald Kulpa on July 15 during a wild argument about whether he was in the batter's box.
"He withdrew his appeal and this is the best time to do it, all things considered," said Red Sox general manager Dan Duquette, who refused acknowledge Everett's injury when asked.
"I don't know Carl's thinking, but we're facing a number of left-handed pitchers over the next 10 days," he said.
Duquette went on to say that Everett is not being fined by the club.
In a game against the New York Mets, Everett became upset with Kulpa after the umpire drew a line on the inside of the batter's box with his left foot, then his right, showing where the hitter could stand.
The two had words and Everett was ejected.
Everett, a switch-hitter, was using an open stance as he usually does against left-handers where his back foot appears over the inside line.
During the ensuing argument, Everett bumped Kulpa before firing his helmet to the ground. After that, he bumped Kulpa again, causing the umpire to jerk his head back. Everett had to be restrained by manager Jimy Williams and coaches Tommy Harper and Wendell Kim.
After going to the dugout, Everett threw a bat on the field, knocked over a water cooler and punched the metal bat rack.
Two days later, Everett dropped his bat during his final time up, showing some discomfort.
"It seems to go back to the weekend," team physician Dr. Bill Morgan said. "He apparently injured it when he had that problem."
Everett did not play on July 18 and also sat out Sunday's 1-0 victory over the Chicago White Sox.
Barring rainouts, Everett will be eligible to return Aug. 4, when the Red Sox play Kansas City at home.