After intentionally walking Torii Hunter to load the bases with two outs, Papelbon gave up a two-run single to Vladimir Guerrero that put the Angels on top, 7-6.
-- Runs allowed by Papelbon, who had not yielded a run in 26 postseason innings entering the ninth.
Buchholz made Boston's offensive uprising stand up early on with a solid outing, tossing five-plus innings of two-run ball in his postseason debut.
Bard fired two scoreless innings in relief of Buchholz, collecting a pair of strikeouts.
Pedroia doubled the Red Sox's ALDS scoring output entering Sunday with a two-run double in the third that plated Jacoby Ellsbury and Alex Gonzalez.
Sense of October
Lines of the Game
Papelbon sat in the dugout in disbelief after coughing up a 6-4 lead in the ninth.
4 AB, R, 2B, 2 RBI, BB
The reigning AL Most Valuable Player delivered a two-run double that put Boston on the scoreboard.
5+ IP, 6 H, 2 R, 2 ER, 1 BB, 3 K, 1 HR, 1 HBP, 1 BK
Buchholz more than held his own in his first playoff appearance.
It will be an early winter vacation for the Red Sox, whose playoff dominance over the Angels disappeared in a hurry.
John Barone is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.