Christian Walker has struggled at the plate this season, contributing to the Astros' need for players like Diaz to step up while they await Alvarez's return.

Christian Walker had an outstanding game recently, contributing significantly to the Astros' victory with four RBIs and a home run, showcasing his power and ability to drive in runs.

Walker was instrumental in the Astros' offensive onslaught, hitting a two-run home run and adding two RBIs with a double, showcasing his critical role in the victory.

Christian Walker's performance contributes to the overall struggle of the Astros' lineup. His strikeouts against the Pirates' pitching staff highlight the need for players to adjust to the changing dynamics of the game.

Christian Walker hit a crucial first-pitch home run to break the tie, marking his eighth home run of the season, showcasing his power potential at a key moment.