Texas has won back-to-back games and is tied for the major league lead with 22 victories.
Robbie Ross (1-0) worked 1 1/3 innings of relief to get the win and Joe Nathan struck out one in a perfect ninth for his 10th save.
Wesley Wright (0-1) gave up the home run to Baker and suffered the loss.
Wright was at the core of Thursday's controversy in Houston's contest against the Los Angeles Angels, one that led to the announcement Friday that umpire Fieldin Culbreth would be suspended for two games.
Wright came into that game, but then was replaced by another reliever without facing a batter. That mistake by the umpires led to the game being played under protest by the Angels, who eventually rallied for a victory.