Fans have noticed STRAUSS marketing on players' helmets during the MLB postseason. Why is there advertising on helmets this year?

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,

But MLB waited until the postseason to make quite the league-wide change.

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,