ARLINGTON -- Rookies Alex Liddi, Mike Carp and Kyle Seager and backup catcher Chris Gimenez all launched home runs Sunday, but the Mariners couldn't out-punch the Rangers as they closed out their road schedule with a 12-5 loss.
It was just the fifth game this year when the Mariners have hit three or more home runs in a game -- and first time they've lost in that scenario -- as Texas torched four of its own homers on the 95-degree afternoon.
"That's definitely not a team you want to have a home run derby with," Gimenez said after Seattle came up short despite equaling its season high with four homers.
Catcher Yorvit Torrealba hit two of Texas' blasts, including a grand slam in the seventh off rookie reliever Chance Ruffin, to equal his career high with five RBIs.
The eight home runs were the most hit at Rangers Ballpark in Arlington this season and just the 10th time in stadium history that two clubs combined for eight or more in one game.
The Mariners were dealt their fourth straight loss in getting swept by a Rangers club that wrapped up the American League West title on Friday and is now tuning up for its second straight postseason run.
Seattle heads home to conclude its season with a three-game set against the A's, having gone 28-50 on the road in 2011 and 1-8 in Arlington.
The Rangers won the season series with Seattle 15-4, the most times Texas has beaten the Mariners in one season.
Manager Eric Wedge acknowledged the Rangers are a tough team to get into a long-ball contest with right now.
"We're not in that game yet," he said. "These guys have a tremendous lineup. But we're working to be better offensively and better individually in every part of our team. Eventually, you put it together."
The Mariners' four home runs accounted for all five of their runs on a day when Seattle totaled 10 hits off five Rangers hurlers.
Rookie left-hander Charlie Furbush, making his last start of the year, gave up a pair of homers to Texas in a 4 1/3-inning outing that wasn't helped by a four-base error on center fielder Trayvon Robinson in the fifth.
Robinson misplayed a line drive by Esteban German with a runner on third and one out, the ball zooming past his mitt and rolling all the way to the wall as the Rangers third baseman circled the bases to give Texas a 6-3 lead.
Another rookie, shortstop Kyle Seager, allowed a ball to get through his legs in the ninth for another unearned run.
"It's more youth than anything else," Wedge said of the club's defensive struggles of late. "We've got some guys in positions they haven't been in for a very long time. We're sending out a lot of kids that are playing at a point of time where they haven't played much before. But they need to learn from the tough plays and tough times and grow confidence from the good plays."
Furbush finished the season 4-10 with a 5.48 ERA, and he was 3-7 with a 6.62 ERA after joining the Mariners in a late-July trade with the Tigers.
"It's been ups and downs, that's for sure," said the lefty. "I've had some success and some failure, but I need to keep working on it and use this as fuel going into the offseason. I'm just trying to stay positive and move forward."
Gimenez launched his first home run as a Mariner in the third inning, a solo shot to right-center for his first long ball since Aug. 27 of last season with the Indians. He's gone 4-for-9 in playing three of the past four games for Seattle as Wedge gives him a little late-season run.
"That was fun. It felt like I haven't done that in forever," Gimenez said of his fifth career home run. "It's just nice to have gotten a few at-bats here the last couple days and get myself going. I've been working in the cage and really trying to focus on finishing this year and making a good case for myself for future consideration."
Liddi turned around a Derek Holland changeup in the third for a two-run bolt that carried 393 feet over the left-field fence, cutting the Rangers' lead to 4-3.
Liddi made several nice defensive plays as well at third base, making his own late-season case to be included in future plans at the hot corner. The 23-year-old Italian went 6-for-20 with three home runs and six RBIs on the seven-game road trip.
"We've seen him make a couple good plays, not just today but in other games as well," Wedge said. "And obviously, if they make a mistake to the young man, he has the ability to drive the ball out of the ballpark. He's hit three home runs here in a short period of time, and they're not cheap ones. He's up there getting his swings in and learning with every at-bat. That's good to see."
Carp reached the upper deck in right field with a 405-foot blast off reliever Darren O'Day in the sixth. The rookie left fielder went 2-for-4, raising his team-leading batting average to .284. He's hit .296 with 12 home runs and 46 RBIs in 61 games since being recalled from Triple-A Tacoma in mid-July.