CLEVELAND — It was a marathon milestone Wednesday for the Indians.

Playing in the 1,400th game in the history of Jacobs/Progressive Field, Cleveland and Oakland needed 16 innings to complete the Indians’ 4-3 victory.

In the end, which came a little over five hours after it began, there was no surprise who the hero for Cleveland was — Jack Hannahan, who stayed hot with a monster night that included the game-winning hit.

Hannahan’s one-out single up the middle off Oakland’s Josh Outman scored a sliding Cord Phelps to touch off a long-awaited celebration.

“It was a long day, but it was worth it at the end,” said manager Manny Acta, whose team won for the sixth time in seven games to remain 5 1/2 games behind first-place Detroit, while moving back into second place a half game in front of the White Sox.

It was the third time this season that the Indians have played at least 14 innings, with the lengthy affair qualifying for the second time in park history that Cleveland has played at least 16 innings.

Nearly all of the credit goes to Hannahan, who drove in three of Cleveland’s runs, with the first two RBIs coming on a pair of solo home runs — one in the second inning and the other in the sixth.

“Jack Hannahan had a huge night,” Acta said of his third baseman, who has been the Indians’ hottest hitter as of late, batting .429 (21-for-49) with three homers and 13 RBIs over his last 13 games.

Hannahan homered in consecutive games for the first time in his career.

“I’m a streaky hitter and I’ve been through this before,” said Hannhan, who entered the season as a .224 hitter in two-plus seasons. “I’m just seeing the ball really well.”

Neither starting pitcher, Cleveland’s Ubaldo Jimenez nor Oakland’s Rich Harden figured in the decision, with both producing nearly identical lines.

Jimenez allowed three runs on six hits (one home run) over six innings, while walking two and striking out six. The only difference on Harden’s line were the two homers he served up to Hannahan.

Jimenez, who entered the night allowing just one earned run in two starts — 15 innings — at home since being acquired in a trade with Colorado, scuffled early, but got better as the game wore on.

He allowed single runs in the second through fourth innings before striking out six of the last seven batters he faced. He fanned five straight from the last out in the fourth until the first out in the sixth.

With both bullpens rising to the occasion in place of the starters, neither team had many opportunities late, but the Indians blew a golden one an inning before they won it.

Jason Donald’s double started the 15th, accounting for the first Cleveland hit since a leadoff single in the seventh from Lou Marson. Donald advanced to third on a fly ball from Jerad Head, but Marson struck out, and after a walk to Ezequiel Carrera, Kosuke Fukudome fanned as well to end the inning.

“We had opportunities to get it done but they didn’t roll over,” Acta said. “That’s the main thing. As long as we win, it’s all good.”

The Indians improved to 783-617 all-time at Progressive Field.

With the Indians’ bullpen depleted, the club will most likely add a pitcher or two from Triple-A Columbus for the series finale today (12:05 p.m.). This is the first day major league rosters can expand to 40 players.

“We’re probably going to have some reinforcements here (today),” Acta said.

Contact Chris Assenheimer at 329-7136 or cassenheimer@chroniclet.com. Fan him on Facebook and follow him on Twitter.