HOUSTON -- Astros infielder Marwin Gonzalez was placed on the 15-day disabled list following Thursday's loss to the Cardinals with a bruised right heel. He suffered the injury stepping awkwardly on first base in the eighth inning of Wednesday's game.

The Astros will make a corresponding roster move on Friday.

"It still hurts and I might be on the DL, but I don't know if I'm going to be able to play after the 15 days," Gonzalez said. "It's just a bruise, but it hurts for now."

Gonzalez is the third Astros position player to go on the DL in less than a week, joining outfielders Travis Buck (right Achilles' tendinitis) and Carlos Lee (left hamstring strain).

Gonzalez was examined by a foot specialist and underwent X-rays after he reported to Minute Maid Park on Thursday with a swollen right foot. Gonzalez, a Rule 5 pick last year, is hitting .261 with one homer and three RBIs in 69 at-bats.

"He came in and was a little tender," Astros manager Brad Mills said. "We took him to get some X-rays and see a doctor. I think it was a little more swollen than we anticipated and that's why we wanted to have a foot doctor check him out."

Center fielder Jordan Schafer returned to the lineup after being held out of the starting lineup the previous two games with an illness. Schafer served as a pinch-runner late in Wednesday's game.

"He's going to have the sniffles and coughs like we all do when you on the back end of a situation like that," Mills said.

Astros remain interested in Soler

HOUSTON -- Astros general manager Jeff Luhnow said the club has continued interest in signing Cuban outfielder Jorge Soler, who was declared a free agent by Major League Baseball earlier this week. It's been reported that teams faced a Thursday deadline to submit bids for his services.

Luhnow wouldn't confirm the club had indeed submitted a bid.

"We continue to have interest in Soler and that's the most I can say right now," Luhnow said. "We're aware of the process and if there's anything report, we will let you all know."

Soler must sign with a Major League club before July 2 or he will be subject to new CBA guidelines that will limit spending on international prospects to $2.9 million per team without penalty. Luhnow said previously he expects the signing process to happen quickly.