Santana (0-1) allowed one earned run on one hit and two walks across two-thirds of an inning, taking the loss to the Astros on Sunday.
Santana entered the game with a one-run lead and one out in the fifth inning. He surrendered a two-run home run to Abraham Toro to give up the lead. He has a 5.35 ERA in 10.1 innings since joining the Rangers. On the season, he has a 5.68 ERA and a 1.70 WHIP with 15 strikeouts in 25.1 innings.