After a robust August, hitting .337 with a .625 slugging percentage, Vladimir Guerrero needed a big September kick to prolong one of the game’s most remarkable streaks.

Batting a quiet .262 with two homers and 12 RBIs in 28 games, Guerrero fell short of .300 for the first time in his career, ending a stretch of 12 consecutive seasons at .300 or higher with a .295 average. It was also the first time since his rookie year in 1997, when he played 90 games, that Guerrero didn’t hit at least 25 homers, finishing with 15.

He’s a .321 career hitter with a .568 slugging percentage, having launched 407 home runs and produced 1,318 runs batted in. That counts for something in the mind of his manager, Mike Scioscia. But, fans being fanatics, it’s not enough to stop malcontents from calling for a new lineup spot for the cleanup man.

In Game 1 of the American League Division Series against Boston on Thursday night, Guerrero singled and scored a run in four at-bats. He also had a hit taken away in his first at-bat on a fine play by third baseman Mike Lowell.

But in a big spot early in the game, bases loaded and two outs in the third inning, lefty Jon Lester made Guerrero look bad, striking him out on an elevated fastball at his shoulders.

One of the great bad-ball hitters in the game’s history, Guerrero looked bad in that at-bat. But not bad enough for Scioscia to drop him in the order and elevate, say, Kendry Morales, who was in the No. 5 slot in Game 2 against Josh Beckett.

“Veteran’s pride is a non-issue,” Scioscia said, denying the widely held notion that Scioscia doesn’t want to hurt his slugger’s feelings. “In that one at-bat, he expanded his zone. One at-bat, he fouled a ball straight back that would have ended up in the rocks [beyond center field]. He hit a sharp ground ball in the hole that Lowell dove for. He had some good swings. In one at-bat, he got a little out of his element.”

Scioscia said he likes the “presence” Guerrero brings to the lineup hitting behind Torii Hunter, whose three-run homer was the big blow in Game 1.

“With Vlad, it takes one good swing, and he gets back where he needs to be,” Scioscia said. “In the middle of the lineup, we need a consistent presence, and we feel it’s going to be Vlad. He hasn’t hit the ball that poorly. In the Texas [AL West] clinching game, he hit four bullets all over the field. That was a week ago.”

Scioscia said that if Guerrero’s struggles warrant a move down in the order, he’d do it.

“If a player’s not getting it done at a level you would need, you would understand a change has to be made,” Scioscia said. “For our lineup to go, we’re definitely going to need Vlad going. We’re a better lineup if he’s swinging the way he can.”