Perez, 25, received his first chance at extended big league action last year with the Braves. Over 133 plate appearances, he slashed .269/.331/.303 and contributed three stolen bases. He was non-tendered by Atlanta earlier this winter.
While he’s always been light on power, the center field-capable Perez has shown quite a bit of speed in the minors and owns a .307/.358/.402 batting line in 1,115 Triple-A plate appearances. He was once a fairly highly-regarded prospect with the Nationals and could still have some function in the majors if he can reach base enough.
The 30-year-old Valdez saw brief MLB action back in 2010, but has pitched exclusively overseas since 2012. His return to affiliated ball was likely driven by his 2015 performance in Mexico. Working for the Olmecas de Tobasco, Valdez threw 160 2/3 innings in 23 starts and racked up 9.0 K/9 against 1.6 BB/9.
The ’Stros also announced their non-roster spring camp invites, which include some notable names from the minor league system. Among them are recent draft picks Alex Bregman and Derek Fisher as well as prospects A.J. Reed, Tony Kemp, Colin Moran, and J.D. Davis.