Tatsuya Imai, a rookie pitcher for the Houston Astros, has returned to Houston for evaluation due to right arm fatigue following his third start of the season. In his last outing against the Seattle Mariners, Imai struggled significantly, allowing three runs and recording only one out while throwing 37 pitches. His performance has contributed to a 7.27 ERA this season, with 11 walks and 13 strikeouts in 8 2/3 innings. Astros manager Joe Espada stated that Imai expressed concerns about arm fatigue, prompting the team's decision to send him back for medical assessment. This situation arises as the Astros are already managing injuries to other pitchers, including Hunter Brown, who was placed on the 15-day injured list due to a right shoulder strain, and Cristian Javier, who was also put on the IL for a similar issue. Imai noted that he had difficulty adjusting to the hard mound at T-Mobile Park but did not report any injury immediately after the game.