While Rangers righthander Yu Darvish again almost perfectly sliced through the Astros on Monday, a rebuilding club with the lowest active payroll in Major League Baseball got a little cheaper and less experienced. Veteran lefthanded reliever Wesley Wright was sent to Tampa Bay for cash considerations. In turn, the Astros promoted former starter and Rice standout Philip Humber from Class AAA Oklahoma City. Wright, 28, was the longest-tenured member of the Astros. He was 0-4 with a 3.92 ERA this year and appeared in a team-high 77 games in 2012. “It’s tough losing Wesley Wright, just because what it is he’s meant to this organization,” first-year manager Bo Porter said. [...]