Endorsement deals have long been a common way to catapult a brand's significance.
But as the latest pulled partnership between former spokesman Jared Fogle and Subway shows, companies can be quick to end an endorsement deal if allegations about a spokesperson's behavior get in the way.
Here's a look back on other failed endorsements that didn't end so well.
—By CNBC's Zack Guzman
Posted 20 Aug. 2015