Pecko is expected to pitch in bulk relief behind opener Miguel Ullola in Thursday's game against the Royals, Brian McTaggart of MLB.com reports.
Lynch (6-5) picked up the win in Wednesday's 5-2 win over the Astros, allowing no runs on two hits and one walk with three strikeouts over five innings.
Massey 3-for-5 with a solo home run and an additional run scored in Wednesday's 5-2 win over the Astros.
Javier (2-6) allowed two runs on five hits and three walks while striking out two over 5.1 innings to take the loss versus the Royals on Wednesday.
Ullola will serve as the Astros' opening pitcher during Thursday's game against the Royals, Matt Kawahara of the Houston Chronicle reports.
Caglianone is not in the starting lineup for Wednesday's game against the Astros.
Wacha (9-9) took the loss after allowing four runs on four hits and one walk over six innings against the Astros on Tuesday. He struck out two.
Brown (6-3) earned the win after allowing one run on two hits and three walks over five innings against the Royals on Tuesday. He struck out 10.
Pena went 3-for-4 with two solo homers, three runs scored and a strikeout during Tuesday's 4-2 win over the Royals.
Alvarez went 1-for-2 with a two-run homer and two walks during Tuesday's 4-2 win over the Royals.
