All-Star Detroit Tigers pitcher Justin Verlander and Sports Illustrated swimsuit pinup Kate Upton spent some time together last weekend in Detroit, fueling rumors that the two might be an item.

The comely blonde model, a native of St. Joseph, Mich., was seen by several fans in Verlander's suite at the Palace of Auburn Hills at last Thursday's Aerosmith concert. The two stars were joined by her BFF, model Lizzy Glynn, and his pal Frank Viola, Jr. (son of Minnesota Twins' pitcher Frank Viola).

(Scroll down to see photos of Kate Upton .)

After the show, the gang relocated to a bar with a mechanical bull (also nearby is Auburn Hills' Toby Keith's I Love This Bar And Grill). According to this Tweet and photo from Glynn, Viola chivalrously took off his pants so she could wear them on the ride.

"He took off his pants so I could wear them to ride the mechanical bull.Yes, Southern gentlemen do exist!! @FrankViola3," Glynn Tweeted.

Detroiters later saw the foursome classing up their evening with a few cocktails at Birmingham's South Bar.

The next night, Upton turned up at the Detroit Tigers game sporting a baseball cap with the Old English D.

Earlier, the two starred in an ad together for MLB 2012 on joining "The Perfect Club."

Gossip sites say Verlander, who will take the mound as the American League's starting pitcher at Tuesday's Major League All-Star game, has been in a long-term relationship with college girlfriend Emily Yuen.

Do you think Justin and Kate would make a good couple?

Hat tip to Busted Coverage.

Check out this video of Kate Upton at the Detroit Tigers game last weekend -- and JV gawking from the Tigers' bullpen.

For more things Kate Upton, see the gallery below.

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  • Vogue US, June 2013

    (Courtesy photo)

  • Harper's Bazaar, April 2013

  • Vogue UK, January 2013

    (Courtesy photo)

  • Vogue Italia, November 2012

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  • Vogue, November 2012

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  • CR Fashion Book, Fall 2012

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  • Interview Russia, July 2012

    (Ellie Muliarchyk photo)

  • GQ, July 2012

    (Courtesy photo)

  • July 2012

    20 year-old Kate Upton denies rumors that she was drinking alcohol at a Detroit Tigers baseball game (TMZ Photo)

  • Vogue, July 2012

    (Courtesy photo)

  • June 2012

    "The Many Talents Of Kate Upton" presented by GQ and shot by Terry Richardson (Youtube)

  • May 2012

    Kate Upton at amfAR's Cinema Against AIDS (Getty photo)

  • May 2012

    "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art (Getty photo)

  • May 2012

    Cannes Film Festival (Getty photo)

  • April 2012

    Bloomberg & Vanity Fair Cocktail Reception following the 2012 White House Correspondants' Association Dinner (Getty photo)

  • May 2012

    Kate Upton dances the "Cat Daddy" for Terry Richardson (Youtube)

  • April 2011

    Kate Upton's famous Youtube video where she dances the "Dougie" at a Los Angeles Clippers game (Youtube)

  • Sports Illustrated, March 2012

    (Courtesy photo)

  • Esquire, March 2012

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  • Carl's Junior, February 2012

    (Youtube)

  • February 2012

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  • Beach Bunny 2012

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  • Remix, August 2011

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  • Guess S/S 2011

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  • Guess S/S 2011

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  • Guess S/S 2011

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  • Guess S/S 2011

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  • Victoria Secret Spring 2011

    (Courtesy photo)

  • Esquire Mexico, March 2012

  • Accessorize S/S 2013

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  • May 2012

  • September 2012

  • September 2012

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  • February 2013

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