The Seattle Mariners are set for a crucial four-game series against their American League West rivals, the Houston Astros, starting Friday night at T-Mobile Park. The Mariners, looking to snap a five-game skid and improve their 4-9 record, will have to ignite their struggling offense without a key bat in the lineup.

Third baseman Brendan Donovan, the 2025 All-Star who has been a bright spot with a stellar .316/.422/.605 slash line, is sidelined with an illness. Manager Dan Wilson confirmed the illness is isolated to Donovan, who began feeling unwell during the team's recent road trip. His absence is a significant blow to a Mariners offense that currently ranks last in the majors with a .581 OPS.

Compounding the challenge, Seattle's hitters will face a new puzzle on the mound: Astros starter Tatsuya Imai. The 27-year-old Japanese import, who signed a $54 million deal this offseason, is coming off an impressive outing where he struck out nine over 5.2 scoreless innings. His unique "wrong-way" slider, which breaks opposite to a typical slider, has already become a talking point and will test the Mariners' scouting and adaptability.

Despite the offensive woes and the unfamiliar opponent, Manager Dan Wilson expressed confidence in his team's resilience. The series opener presents a tough but prime opportunity for the Mariners to reset and prove they can compete in the AL West, starting with solving the riddle of Tatsuya Imai.