In his first start since Nov. 3, Anderson stopped 26 of 31 shots Tuesday in a 5-0 loss to the Philadelphia Flyers. He missed three games because of a sore neck, the result of a goalmouth collision with Dallas Stars rookie Valeri Nichushkin.
Robin Lehner led Ottawa to three straight wins while Anderson was sidelined. Lehner was named the NHL's First Star of the Week on Monday after posting a 1.33 goals-against average and .958 save percentage in wins against the Columbus Blue Jackets, Montreal Canadiens and Florida Panthers.
After making the point that "Craig's the No. 1 goalie," Senators coach Paul MacLean joked about how he arrived at the decision to come back with Anderson against Boston.
"It came up heads?" MacLean said after Ottawa's morning skate.