As was the case the night before, one big inning did in the Marlins at Fenway Park.
The Red Sox took the two-game series as four runs in the third inning fueled a 6-3 victory.
The Marlins have lost their past four and have started getting a little sloppy.
In two games, eight of Boston’s 10 runs were unearned as Miami made five errors.
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“It was very costly, sloppy and uncharacteristic of who we have been,’’ said manager Dan Jennings, whose team gave up one earned run Wednesday.
“We have to do a better job of taking care of the ball. There’s no excuse for it. ... We’re a better team than that, our defense has been our strong point.’’
Boston has been making up ground in its attempt to climb out of the AL East cellar and next plays host to the division leading Yankees having won four straight and nine of its past 12.
On Wednesday, the Sox jumped on Tom Koehler in the third.
With runners on second and third and no outs after a Koehler throwing error, Brock Holt’s grounder plated the first run.
Xander Bogaerts, the hero of Tuesday’s game with a bases-loaded clearing single, drove in Mookie Betts.
David Ortiz had the biggest hit of the abbreviated series, knocking a 1-1 pitch from Koehler into the seats on top of the Green Monster in left to make it 4-0.
“I had to battle a bit, wasn’t as crisp as I have been,’’ said Koehler (7-5), who gave up five hits in his six innings.
“I made some pitches to get through it. It was unfortunate I didn’t make a play that led to a big inning. That ultimately cost us the game.’’
The Marlins didn’t pack things in despite the four-run deficit and actually had a chance to take the lead in the top of the fourth.
With one out, Mike Morse and Derek Dietrich each singled. Morse scored Miami’s first run on a soft single by J.T. Realmuto. Dietrich came home on Cole Gillespie’s single.
Ichiro Suzuki, who had gone hitless in 29 straight at-bats, kept things going for the Marlins with a bloop single to left.
That’s as far as Miami got, however.
The struggling Rick Porcello continued on after getting Dee Roberts to ground into a fielder’s choice for the second out then ended the threat on Christian Yelich’s grounder to second.
Porcello (5-9) went six innings and picked up his first win in nine starts. Porcello hadn’t registered a victory since May 16.
“When you get those chances, you have to capitalize on them,’’ Jennings said. “We had the chance and didn’t do it. Boston did the opposite. They took advantage.’’
Boston increased its lead with single runs in the sixth and seventh.
In the sixth, Ortiz led off with a double then came home on a the double play Pablo Sandoval hit into.
Alejandro De Aza reached on Sam Dyson’s throwing error to lead off the seventh. De Aza advanced to second, stole third and raced home when Realmuto’s throw sailed into left field.
Morse chipped into the deficit with a solo homer in the eighth, but the Marlins did no more damage as they left seven runners on.
“I was pleased with the offense, the way they battled,’’ Jennings said. “We had 10 hits. Usually that’s enough to win. We have to do a better job with runners in scoring position.”