You don’t really think the Yankees would allow Shef to leave the Apple so he could get reacquainted with the fans in the right-field corner in the Fens, do you? Sheffield would be a fearsome addition as a No. 5 hitter behind Manny -- or protection for David Ortiz if the Sox moved Manny -- but there’s a better chance of Johnny Damon returning to Yawkey Way than Sheffield getting clearance to relocate here.