It's too bad the Red Sox didn't make last night's comeback against the Seattle Mariners. That way, the metaphor of salmon swimming upstream would work geographically. But, maybe there are some carp swimming up the Chesapeake Bay. We digress. Mike Carp flared a little looper that scored the eighth-inning winning run in a 4-3 comeback thriller at Fenway. Boston trailed 1-0, 2-0 and 3-1 when Dustin Pedroia capped the comeback with a two-out, two-run double in the seventh. John Lackey pitched very well again, going 7 1/3 innings and giving up three runs. Boston maintained its 2.5 game lead on Tampa.