The Houston Astros have encountered significant injury challenges as shortstop Jeremy Pena and starting pitcher Tatsuya Imai were placed on the injured list on Monday. Pena is dealing with a Grade 1 right hamstring strain, which he sustained during a game against the Seattle Mariners. He had previously finished that game but was unable to continue in the following match, leading to imaging tests. Pena has had a solid season, batting .256 with five runs scored, and was an All-Star last year, boasting a .304 average with 17 home runs and 62 RBIs. Meanwhile, Imai is sidelined due to arm fatigue after a brief outing where he threw only 37 pitches and managed just one out. The Astros have struggled recently, going 1-8 on a 10-game trip, further complicated by injuries to other pitchers including Hunter Brown and Cristian Javier, who are also on the injured list due to shoulder strains. Additionally, starter Cody Bolton left a game early due to mid-back tightness, exacerbating the team's pitching woes.