Dominguez isn't in the lineup Tuesday against the Athletics, Brian McTaggart of MLB.com reports.

Dominguez last tallied a hit on Aug. 20, a span of 13 at-bats, which has pushed his slash line to a miserable .223/.262/.344 on the season. He'll hand over the hot corner to Gregorio Petit, who is batting ninth.

Dominguez is not in the lineup Saturday, the Houston Chronicle's Jose de Jesus Ortiz reports.

Gregorio Petit will get a rare start at the hot corner, as Dominguez is given a standard day off. He is one of several Astros (other than Chris Carter and Jose Altuve) who have not lived up to the starting role they've been given this season, and his long-term future with the team is probably still up in the air. His .226/.266/.349 slash line makes him unusable in standard leagues that count batting average or OBP.

Dominguez is out of the lineup Saturday at Boston, Brian McTaggart of MLB.com reports.

The Astros are holding Dominguez out for the first time since May 23, which allows Gregorio Petit to cover the hot corner. Dominguez has continued to scuffle along at the plate in August, slashing .214/.237/.304 with one homer, five RBI, and three runs in 56 at-bats.

Dominguez went 2-for-4 with his 14th home run of the season in Thursday's loss to the Red Sox.

Dominguez's two-run shot came in the fourth inning off Allen Webster. It was his first home run since July 28.

Dominguez went 2-for-3 with a double, two RBI and a run scored during Sunday's win over Toronto.

Dominguez's strikeout rate has increased from 16.3 in 2013 to a career-worst 19.8 percent this season, but he has made improvements in other areas. His batting average against lefties (.277) and a slightly improved walk rate (5.3 percent) are certainly worth mentioning as the soon-to-be 25-year-old closes the gap on his second full season in the big leagues.

Matt Dominguez drove in four runs and finished 3-for-5 as the Astros defeated the White Sox on Sunday.

Dominguez entered the contest having driven in only two runs in his previous 18 contests. He singled in a run in the third inning, belted a two-run home run in the fifth, and doubled in a run in the seventh. Quite the productive day for the third baseman, who has otherwise had a forgettable season. Dominguez is slashing .239/.286/.375 with 12 home runs and 43 RBI.

Matt Dominguez finished 2-for-4 with three RBI to lead the Astros past the Rays 7-3 on Saturday.

Dominguez was buried in a slump heading into the afternoon game and snapped out of it in a big way, singling in the second inning and smacking a three-run double with the bases loaded in the third. He's still batting just .246/.299/.395 on the season, but the 24-year-old third baseman can boast nine home runs and 30 RBI.

Matt Dominguez went 3-for-4 with a solo homer against the Twins on Friday.

It was his first three-hit game of the season. Dominguez is up to nine home runs on the year and has a chance to top the 21 he hit last year.

Matt Dominguez went 2-for-4 with a double and a run scored in a win over the Mariners on Sunday.

The multi-hit game was his first since May 19, and he hadn't scored a run since May 18. Dominguez owns a .254/.308/.420 line through 50 games.

Matt Dominguez hit a pair of two-run homers off John Danks as part of the Astros' 8-2 win over the White Sox on Sunday.

Dominguez, who drove in 77 runs last season, entered today's game with just 14 RBI in 42 games. Obviously, this one helps his pace a bit. He's a zero in steals and below average in batting average and runs scored, so he has to keep showing power to be an adequate fantasy third baseman.

Matt Dominguez was the Astros entire offense in Friday's loss to the Rangers, going 2-for-4 with a pair of singles.

Those two singles, including one to break up Yu Darvish's perfect game in the sixth inning, were the only hits that the Astros would muster in 12 innings against Rangers pitching. Even with the two knocks, Dominguez is hitting a meager .171/.250/.400 on the season.

Matt Dominguez went 1-for-3 with a solo home run as the Astros defeated the Yankees 3-1 on Wednesday.

Dominguez homered off of David Phelps in the seventh inning, extending the Astros' lead to 3-1. The third baseman hit 21 home runs last season, but was otherwise unimpressive, finishing with a .241/.286/.403 slash line in 589 trips to the plate.

According to Jeff Passan of Yahoo! Sports, the Astros are closing in on a five-year contract extension with 24-year-old third baseman Matt Dominguez.

Passan says the deal will carry around $17 million in guaranteed money and also includes two club options worth between $8-10 million apiece. Dominguez is a highly-rated defender at third base and tallied 21 home runs and 77 RBI in 152 games last year, but he owns an underwhelming .248 career batting average and .700 career OPS. It's a somewhat risky move for a low-payroll club like Houston.

Matt Dominguez hit his 21st home run of the year against the Rangers on Tuesday.

What's more, the blast came off Rangers ace Yu Darvish. The home run gave Dominguez 76 RBI, second on the team to Chris Carter's 80 RBI this season. It was just Dominguez' second home run in the month of September.

Matt Dominguez was hitless in four at-bats in his return to the lineup Saturday.

Dominguez was hit on the left hand with a pitch Thursday and then sat out Friday's contest, but it's not a long-term issue. He's hit .242/.287/.407 with 20 homers and 75 RBI for the Astros this season.

Matt Dominguez (hand) is not in Friday's lineup against the Indians.

Dominguez left Thursday's game after he was hit in the left hand with a pitch. The severity of the injury isn't yet known. Brandon Laird is filling in at third base Friday.

Matt Dominguez left Thursday's game against the Indians after being hit on the left hand by a pitch.

Dominguez was in a ton of pain and had to be removed for a pinch-runner. The Astros will surely send him for X-rays before we know more about his status.

Matt Dominguez blasted a grand slam in Friday's 9-7 win over the Angels.

Trevor Crowe put the Astros ahead with an RBI single in the fifth inning, but Dominguez's blast off Cory Rasmus proved to be the difference in the ballgame. The 24-year-old is hitting just .243 with a .285 on-base percentage this season, but his 20 homers and 74 RBI have been quite useful in deeper fantasy formats.

Matt Dominguez went 2-for-3 with a walk, two doubles and two runs scored in a win against the Mariners on Wednesday.

Dominguez finished 5-for-11 with three walks and three doubles in Houston's three-game sweep over the Mariners in Seattle. It's the Astros' third sweep of the season and first three-game sweep (they also have one two-gamer and a four-gamer). Dominguez is batting only .242, but he's accumulated 19 homers and 70 RBI.

Matt Dominguez has sat out the last three games due to a sinus infection.

"They gave me some medicine and I feel a lot better," Dominguez said. "I didn't really know what it was. I had never had one before. I got very light-headed and dizzy for no reason. When I looked around I had a lot of pressure in my head." Dominguez is hoping to play on Friday.