Mark Teixeira hit a three-run shot to highlight a club-record, four-homer second inning, and Dellucci had two of the Rangers' team-high eight home runs in an 18-3 rout of the Houston Astros on Saturday.
"Eight-homer games don't happen very often," said Dellucci, who went 3-for-4. "We got a fast start and they were just coming in bunches. Hopefully, we saved a few for tomorrow and down the road."
All four second-inning homers and the Rangers' eight runs -- Texas' season high for runs in an inning -- came with two outs.
"We've done it in the past and we broke out today," Teixeira said. "It's good for our confidence to put a lot of runs on the board. We had some good at-bats today. We started hot and built from there. It was contagious."
Blalock, who went 4-for-5 and drove in four runs, followed with his seventh homer and Mench had an RBI double to knock out Astacio. Nix added a solo shot off reliever Chad Harville to extend the Rangers' lead to 10-0.
Texas had 25 three-homer innings before breaking the mark on Saturday.
The major league record for home runs in an inning is five, accomplished by three teams in the National League and by Minnesota in the AL. The Twins were the last to equal the mark, on June 9, 1966, against Kansas City in the seventh inning.
"We didn't pitch very good," Houston manager Phil Garner said. "We made a bunch of mistakes and they didn't miss 'em. It was a tough go. I've been concerned since the first week. I've got no answers."
Astacio allowed nine runs and nine hits over 1 2/3 innings in his fourth major league start.
Rangers starter Chris Young (4-2) gave up two runs and five hits over five innings. He struck out six and didn't issue a walk. Young's goal was to finish innings with a minimum of pitches to get his team out of the 98-degree heat.
"Even after we scored the eight runs, you tell yourself that it's 0-0," Young said. "I wanted to get through innings and get the guys back in the dugout."
Dellucci homered and Blalock's RBI double later in the first made it 2-0. Dellucci's solo shot in the third gave him his fourth career multihomer game.
Ensberg's two-run homer in the fourth reduced Texas' advantage to 11-2, but Hidalgo's fifth-inning homer made it 12-2.
Mench's two-run drive in the sixth off Mike Burns stretched the Rangers' edge to 14-2.
- The eight homers were the most by a team in interleague play.
- Garner said LHP Andy Pettitte will skip Monday's scheduled start against the Chicago Cubs to rest his tight left elbow.
- The Rangers tied the AL mark for homers in an inning with two outs. Boston had four against Detroit on July 18, 1998.
- Texas scored its most runs since an 18-3 win over Houston last July 4.
- The Astros set a club record for the most homers allowed. They had given up six in a game four previous times.
- Dellucci was back in the lineup after leaving Friday night's game in the fourth inning because of a migraine headache.
- Dellucci has two career homers leading off a game.
- Texas' 11 extra-base hits matched the second-highest total in club history.