A comeback win kept the Red Sox in first place. Staying there could be tougher if Tim Wakefield is sidelined. A back injury ended the knuckleballer's outing after four innings Monday night, and Boston rallied from a four-run deficit for a 5-4 victory over the Royals capped by Manny Ramirez's sacrifice fly in the eighth inning. Wakefield, whose start was pushed back a day so he could rest his back, will undergo tests on his strained upper back Tuesday, and manager Terry Francona said "I guess I'm still hoping" he doesn't go on the disabled list.