A’s get another shot at Astros; interest in Sonny Gray HOUSTON - The last time the A’s got red-hot, taking four games from the Yankees on their last homestand, the Astros doused them thoroughly, sweeping a four-game series. [...] coming off the team’s first road sweep of the season, Oakland must face first place Houston again in a three-game set that opens Tuesday night. [...] we come here and sweep the Sox - I think it’s like we get a second chance against the Astros. Oakland is 1-8 overall against the Astros overall, 17 1/2 games back in the AL West. After sweeping the White Sox, the A’s are 12-25 on the road, the worst mark in the league, as they head to play at Minute Maid Park. “It’s no secret we’ve struggled on the road,” Sonny Gray said Sunday after recording his first win in a month. Guys in the clubhouse are aware, we’re smarter than people think sometimes. Among the clubs with multiple executives and scouts at Gray’s start Sunday: the Cubs, the Blue Jays, the Mariners and the Braves, while the Red Sox had one scout there. Some of the teams in attendance also are scouting infielder Jed Lowrie, who is all but assured to be dealt before the July 31 deadline; Boston, Lowrie’s first big-league team, is a club that is likely to have interest. Susan Slusser is a San Francisco Chronicle staff writer. The A’s have struck out a league-leading 233 times in June, a new record for the team for the month, surpassing 2012’s mark of 231. Oakland already had set franchise records for strikeouts in May (255) and April (221).