"It feels like a playing card," Skubal said ... Duvall included a hand-written letter with the card: ANOTHER AGREEMENT: Tigers ace Tarik Skubal 'just signed a deal' with Nike. Here's what that means ...

"It feels like a playing card," Skubal said ... MORE ABOUT HIM: Tarik Skubal for Cy Young again? Tigers ace at spring training early and ready for repeat Duvall, a 23-year-old who graduated ...