Beginning this season, the teams said Friday, they will join rock star Eddie Vedder in creating the real Vedder Cup, the prize for the victor in their six-game season series. Fans have playfully referred to the Padres vs.

Named for Pearl Jam frontman Eddie Vedder, who grew up in San Diego and came to fame with Seattle rock giants Pearl Jam, the Vedder Cup moniker was originally coined by sportswriters in the two cities, searching for a nickname for the rivalry between the two teams, who were designated as "natural rivals" when MLB adopted interleague play in 1997.

It’s still the Vedder Cup -- only now, it’s official. For years, games between the Padres and Mariners have been informally known as “The Vedder Cup” -- a reference to Pearl Jam front man and Rock & Roll Hall of Famer Eddie Vedder,