The 34-year-old Bay's deal guarantees $500,000, with another $500,000 included if he makes the team out of spring training.

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After a delay of a couple of days, the Mariners on Saturday officially announced the signing of free-agent outfielder Jason Bay to a one-year, $1 million contract.

As reported on Thursday, the deal guarantees Bay $500,000 and an additional $500,000 if he makes the team out of spring training. There are also up to $2 million in incentive bonuses attached to the contract.

“I am glad we were able to put this together and bring Jason back to the Northwest to continue his baseball career,” Mariners general manager Jack Zduriencik said in a release about Bay, a 34-year-old resident of Kirkland. “This is a good opportunity for Jason as well as the Seattle Mariners. Jason has a history of being a productive major-league player and has participated in postseason play. We look forward to adding his experience to our young group of players.”

To make room for Bay on the 40-man roster, the Mariners designated for assignment minor-league pitcher Mauricio Robles, acquired with left-hander Luke French at the 2009 trade deadline from Detroit in exchange for Jarrod Washburn.

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Robles, 23, went 2-5 with a 5.78 earned-run average in 43 appearances — six of them starts — in Class AAA and AA last season. His stint in Seattle’s system has been plagued by injury and poor performance.

Bay signed a four-year, $66 million deal with the New York Mets before the 2010 season, but was hampered by injuries and dismal numbers. He was released by the Mets with a year to go on his contract but will still be paid the $21 million he is owed, though some of the payments have reportedly been deferred.

The Mariners will have an informal gathering with Bay and the media at Safeco Field on Monday.

“Jason is a gritty, talented player with a winning attitude,” Mariners manager Eric Wedge said in a release. “We know he has a passion for the game and are looking forward to having him on the field when we get things going in a few months in Peoria.”

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