The catcher has had that type of year at the plate, and he came through again Tuesday night in Fenway Park, lining a Koji Uehara offering off the Green Monster to plate the winning run in the ninth inning and send the Angels to a 4-3 victory.
They've won six of their last seven, are a season-high 24 games above .500 and hold a half-game lead in the American League West over the A's, who beat the Mets, 6-2.
"We haven't had this feeling for a while," longtime ace Jered Weaver said after being charged with three runs in 5 1/3 innings. "We're playing good ball. If one thing isn't clicking then the other thing is clicking, as far as offense and defense. It makes this time of year that much better when you have something to play for, and you can go out there and just keep battling. This team is relentless. We always find a way to win games."
In the second of a four-game series against the defending World Series champions, the Angels found it in the glove of right fielder Kole Calhoun, who skied about four feet above the short fence in right field with two outs in the second to take away a three-run homer from Brock Holt.
"Game-changer," Iannetta said.
They found it in the perseverance of Brennan Boesch, who was on an 0-for-17 slump before his two-out, ground-rule double to center field gave the Angels a baserunner in the ninth.
"You just keep plugging away," Boesch said. "I'm starting to settle in."
They found it in the bat of Iannetta, who lined a 2-1 splitter from the Red Sox's closer just out of the reach of a leaping Daniel Nava, plating Boesch and setting it up for Huston Street's ninth-inning save.
"It was the movement," Uehara said. "I didn't have that drop."
And they found it, once again, in the bullpen, which twirled 3 2/3 scoreless innings to put its ERA at 2.39 since the All-Star break.
Street came on in the ninth two days after giving up his first runs with the Angels to blow his second save of the season in Arlington. After giving up a leadoff single to pinch-hitter Yoenis Cespedes, he retired Holt on a sacrifice bunt and struck out Dustin Pedroia on a slider in the dirt. The next pitch sailed wide of David Ortiz, who homered earlier against Weaver.
And with first base open and two outs, Angels manager Mike Scioscia signaled for the intentional walk that put the winning run on base.
The next batter was former Angels catcher -- and current Angels killer -- Mike Napoli, who swung through a 2-2 slider to end the game.
"If we got ahead, you might have let that at-bat play out," Scioscia said. "But once it was 1-0, I think we wanted to start fresh and go after a right-handed bat. Both guys will hit a mistake, and Huston didn't make one."