HOUSTON -- Brandon Barnes and J.D. Martinez left Tuesday's game with injuries and were not in Wednesday's starting lineup.
"Both of them are available, but they're not in the lineup," Astros manager Bo Porter said. "They're sore, obviously, from the different injuries sustained. So we're going to try to get them the day [off] and hopefully with treatment they'll be ready to go tomorrow."
Barnes injured his calf running the bases.
"I had to take myself out. I couldn't run. I didn't want to hurt the team in any way," Barnes said. "I want to be out there, but at the same time, I don't want to hurt the team. It's feeling a lot better today. Hopefully, taking the day off, I'll be ready to go tomorrow.
"We're going to take it day by day, but the way I feel right now, and if it heals like it did from last night to today, I should be ready to go tomorrow."
Porter said that Martinez, who sustained a left lower back contusion following a collision with center fielder Justin Maxwell, is feeling better than anticipated.
"I'd rather not play him and give it time to heal so that you don't have any setbacks once you do get back in the lineup," Porter said. "If pressed into it, I think J.D. could go before Brandon."
Fields notches first win in Tuesday's comeback
HOUSTON -- Josh Fields picked up his first Major League win on Tuesday, working a scoreless ninth inning in the Astros' 5-4 comeback victory over the A's.
Fields said the night was memorable for several reasons, not simply for his first big league W.
"It was pretty awesome, obviously for the first win, but more than that I was pumped for our team coming back last night and getting that win," Fields said. "We've been struggling a little bit lately, and it was nice to come back with a win like that.
"What was also awesome was [Jarred] Cosart having an unbelievable start, his first start here at home in Houston. And [Jonathan] Villar, second game up, coming up big. I thought that was pretty big what he did against [Grant] Balfour, a proven closer who's having a great year."
In his second big league start, Cosart went seven strong innings, while Villar tallied three hits and sprinted home from second base with the winning run on a botched pickoff attempt.
Wallace hopes Astros can have success on road
HOUSTON -- The Astros snapped a season-long 10-game losing streak to Oakland on Tuesday, and Brett Wallace said he is hopeful that the team can carry that momentum into its upcoming road trip.
"As a young team, that's the next step we take," Wallace said. "You have to beat people in your division, and we had struggled with the A's in the past. So we came up last night and got a win. Hopefully, we can build on that, and one of the next steps is taking it on the road and really putting together good road trips."
Following Wednesday's finale, the Astros will embark on a 10-game road trip through Toronto, Baltimore and Minnesota.
"We're going to play a long road trip, but it's also against some good teams," Wallace said. "Toronto is a talented team, and then we're going to Baltimore and then Minnesota. Those are all teams that have a lot of talent. We just need to go out there and stay focused and just try to win every series."
• For Wednesday's flight to Toronto, the Astros' traveling party will be wearing hockey jerseys.
"What better time to have the hockey theme than when you're going to Canada," said Porter, who quickly added, "I only know one hockey player: Wayne Gretzky.
"I'm a firm believer that sometimes you have to step out of the element and allow the guys to have a little freedom and this is one of the ways."
Glenn Sattell is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.