SAN DIEGO -- Although Geoff Blum injured his right elbow in an unusual way on Thursday night, the impact of his injury is no less serious.

Blum felt a "pop" in his elbow while putting on his shirt following Thursday's contest against the Padres, according to manager Brad Mills. With the soreness continuing into Friday, Blum was evaluated at a local hospital where doctors found "loose bodies" in the elbow.

"He was putting on his shirt after the game, and his elbow goes, 'Boom, pop,' and it blows up on him," Mills said.

For now, Blum is listed as day-to-day, but prior to Friday's game, Mills said he expects Blum to miss at least a few days, and general manager Ed Wade indicated that Blum is a candidate for the disabled list.

"It's just wear and tear," Blum said. "There are probably 90 percent of us in the big leagues that have loose bodies floating around, it just so happens that after the game, it tightened up on me. The shirt had nothing to do with the [darn] injury."

The roster move that sent outfielder Jason Bourgeois to Triple-A Round Rock also has implications based on Blum's status. Should the club decide to place Blum on the 15-day DL, it could immediately bring Bourgeois back to the Majors, explained Wade.

"In the event of a DL, we can bring [Bourgeois] back at any point," Wade said. "So, he's actually not even scheduled to fly until [Sunday] and by then, we'll know more about Geoff's status."

Mills said the decision to send Bourgeios, who filled the fifth-outfielder role for the club, to the Minors was based more on needing an alternative in the infield while Blum is shut down, and playing with four outfielders on the roster presents less of a risk.

"It looks like we might not have [Blum] for maybe three, four, five days, so if we were to make the move with him, we would be down a middle infielder for four or five days," Mills said. "So we felt that we would rather go with four outfielders than not have a backup middle infielder."

Sanchez arrives; Bourgeois optioned

SAN DIEGO -- With the addition of newly acquired infielder Angel Sanchez, who came to the Astros in a trade with the Red Sox on Thursday, Houston optioned outfielder Jason Bourgeois to Triple-A Round Rock on Friday.

Sanchez was in the clubhouse prior to Friday's game against the Padres, and shook hands with several of his new teammates, while also being immediately inserted into the lineup at shortstop for the second of a four-game series.

The 27-year-old Sanchez spoke highly of a new opportunity after being dealt from the team that signed him as a free agent in January.

"It's a good feeling going to a new team, and I'm going to try to help the team out to win," Sanchez said. "I was really happy to try something new, and I'm just going to go from there."

While he only made one start for Boston this season, Sanchez expects to see more playing time with Houston. The versatile infielder has experience at third and second base, and is content playing wherever the team needs him.

"I'm going to play everything," Sanchez said. "A little bit of everything, and wherever they want to put me, I will be ready to play."

Manager Brad Mills observed that Sanchez was ready to play as soon as he arrived, and is eager to see more from the team's newest player.

"We're putting him in and see how he does and go from there," Mills said. "He came out and took early [batting practice] today and looked good, so we just thought we'd put him in and go from there."

The reports Mills and the club received on Sanchez emphasized his defense, but Mills also added that Sanchez should bring speed to the lineup as well.

"He's strong defensively," Mills said. "He can run a little bit, I think he adds a little bit of speed. He's supposed to be a strong defender, and we'll see. The Red Sox talked very highly of him. We'll see what we've got."

Padres, Astros remember 'bee game'

SAN DIEGO -- Friday was the anniversary of the infamous "bee game" between the Padres and Astros at PETCO Park, where the contest was delayed for more than 50 minutes in the top of the ninth inning because of a swarm of bees that gathered in left field.

And, coincidentally, the Astros were in town again on the same exact date, and members of both teams reflected on the interesting cause for delay a year ago.

"You don't see that every day," Padres manager Bud Black said. "As a matter of fact, I've never seen it [before or since]. That was bizarre."

Padres left fielder Kyle Blanks was the first player to notice the swarm of bees when Miguel Tejada was batting with two outs in the top of the ninth inning. He then started walking toward the infield and tried to get Padres shortstop Everth Cabrera to call time, but another pitch went by before Blanks could get Cabrera's attention and the game was stopped.

"There were a couple bugs just flying around me, and I just kind of swatted at them and didn't really think anything of it," Blanks said. "Then, they wouldn't leave me alone, and as I swatted one [behind me], I turned around and there was a wall [of bees].

"I felt kind of weird having to stop the game, because I wasn't sure if anyone else could see them. When everyone could see them, it was kind of a relief, because for a moment, it was just like on my own and I looked like I was crazy."

The bees then flew under a bat girl's jacket that was hanging over a chair down the left-field line, and a beekeeper was called upon to kill the swarm. The game resumed shortly after, with Houston eventually coming away with the 7-2 victory.

"It was crazy, because nobody really knew what was going on at first," said Astros first baseman Lance Berkman. "I just figured they'd clear out, but they all went under the bat girl's jacket down the line. It just seemed like we waited forever. We thought they were going to trap them or something, but [the beekeeper] ended up just spraying a bunch of Raid and killing them all."

And for the visiting Astros, the unconventional delay also added an extra headache to a "getaway game" before they could move on to San Francisco for the next series of their road trip.

"We were all kind of annoyed," Astros shortstop Geoff Blum said with a laugh. "We wanted to get the heck out of here and get on with our lives. It ruined the whole time frame of what we had going on that getaway day."

Worth noting

The Astros' nine walks on Thursday set a season-high and raised the hopes of manager Brad Mills that the club may be showing signs of more selectivity at the plate. "I hope it's a trend," Mills said. "I hope it becomes a trend. I think the better at-bats up and down the lineup help." ... Thursday's 10-inning win in San Diego improved Houston's record to 4-1 in extra-inning games on the road and 5-2 overall. ... Facing the Padres and doing so in PETCO Park has been friendly to the Astros of late, as the club has won four of its last five games in San Diego and 10 of 13 against the Padres overall.