Pena left Saturday's game against the Orioles with a facial abrasion and is considered day-to-day, Danielle Lerner of the Houston Chronicle reports.
Pena appeared to land hard on his face after diving into home plate on an Alex Bregman sacrifice fly in the top of the fifth inning. While it would seem Pena avoided a serious injury, the Astros could always hold him out through Monday's team off day as a precaution with the division already wrapped up.