Pyramid Breweries has announced a multi-year sponsorship deal with the Seattle Mariners.

The US-based brewer of speciality beers produced under the Pyramid and MacTarnahan's brands has also announced an opening day promotion for fans on 31 March in conjunction with the sponsorship deal.

"Fans in the north-west are passionate about two things: baseball and beer. And they love the Mariners and Pyramid," said Scott Barnum, CEO of Pyramid Breweries. "We're looking forward to lively and winning events throughout the 2008 baseball season that will give fans even more opportunities to enjoy Pyramid beers as they root for our Seattle Mariners."

Joe Chard, vice president of corporate business for the Seattle Mariners, added: "We are thrilled to be partnering with our local neighbours and a true north-west icon."

Pyramid Breweries owns two alehouse restaurants adjacent to its full-production breweries under the Pyramid Alehouse and MacTarnahan Taproom brand names in Berkeley, California, and Portland, Oregon, respectively, and three alehouse restaurants in Walnut Creek and Sacramento, California, and Seattle, Washington.