KANSAS CITY, MO - DECEMBER 30: Oakland Raiders head coach Jon Gruden before an NFL game between the Oakland Raiders and Kansas City Chiefs on December 30, 2018 at Arrowhead Stadium in Kansas City, MO.

Raiders' staff slapped stickers on players' helmets at Senior Bowl

Icon Sportswire / Getty

Jon Gruden added extra incentive to the 2019 Senior Bowl.

The Oakland Raiders head coach - who led the North team in Mobile, Ala. - and his staff slapped stickers on the helmets of players who made big plays.

They weren't exactly small stickers, either.

Love Jon Gruden just slapping Raiders stickers on players after good plays. Not even straight. Wrinkles everywhere. Just smacks it wherever he pleases. pic.twitter.com/CdwzoWWq3u
— Matt Schneidman (@mattschneidman) January 26, 2019

Everyone is getting a @Raiders sticker 👀☠️

📺: @seniorbowl only on NFL Network pic.twitter.com/3xLokszKWo
— NFL Network (@nflnetwork) January 26, 2019

Score a TD, get a @Raiders sticker ☠️

📺: @seniorbowl only on NFL Network pic.twitter.com/HqN5HIPyNJ
— NFL Network (@nflnetwork) January 26, 2019

Though not seen in the NFL, sticker slapping isn't all that new to college football. Ohio State and Florida State are among the teams that award helmet decals to individual players for great plays or contributions on the field.