Of course, Kate Upton knows how to rock an Astros jersey.

After all, the 25-year-old, who is engaged to Astros star pitcher Justin Verlander, is one of the world's top models and a Sports Illustrated Swimsuit Issue two-time vet.

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She's been spotted in the VIP boxes and on the field at Minute Maid Park in vintage Astros looks.

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Take her $200 rainbow emblazoned men's sweater she wore at game 3 of the World Series in Houston. It came from the Philadelphia-based Mitchell & Ness and has been sold out since Upton appeared in photos on social media. The company has re-ordered the sweater, but is not certain when it will be available.

That's no consolation for Andrea Bonner, a professor in the fashion department at Houston Community College, who has been checking the Mitchell & Ness website daily and fears she'll be teaching class when the sweater goes up for sale again. Bonner said Upton's styling of the men's sweater - leaving it unbuttoned and wearing it with orange stilettos - gave it a feminine feel.

Also, the retro Astros' rainbow logo has been a hit with fans and celebs. Singer Kam Franklin of The Suffers wore a similar sweater when she sang the National Anthem at an Astros game in August.

The Astros' bright striped uniform was introduced in 1975 and was considered a radical design at the time. The team wore the rainbows through 1986.