Major League Baseball's September 1 roster expansions have prompted several notable call-ups, providing opportunities for players like Zach Eflin of the Orioles, who returns from injury, and top prospects like Coby Mayo, who is set to make a significant impact during the playoff push. The Seattle Mariners, struggling offensively despite having one of the best starting rotations, are looking to their farm system to bolster their lineup and secure a playoff spot, having already made moves like acquiring Randy Arozarena and Justin Turner. Meanwhile, the Houston Astros are calling up players like Forrest Whitley to aid their injury-plagued pitching staff as they aim to solidify their lead in the AL West. The Orioles, fighting for the AL East title against the Yankees, are relying on their deep farm system and players like Corbin Burnes to make a strong playoff run.