Major League Baseball's playoffs are getting underway on Tuesday afternoon with the commencement of the best-of-three Wild Card Series. (You can view the full postseason schedule here.) When the players take the field to kick off October,

In September, MLB announced it had entered into a leaguewide helmet sponsorship partnership with STRAUSS. It doesn't just cover the big leagues, as the company's logo will be on all helmets in minor league baseball starting in 2025. It is the first time batting helmets have been used to promote a company across Major League Baseball.

For the past two seasons, the Houston Astros have worn an Oxy advertising patch on the left sleeve of their uniforms. When they opened their eighth straight trip to the postseason with a 3-1 loss to the Tigers on Tuesday,

The MLB postseason is underway, starting with four Wild Card games on Tuesday. Fans watching any of those matchups will notice a change in everyone's gear. Throughout the playoffs, hitters from all teams will wear an advertisement on their heads.