Aardsma and Lowe were among the five Mariners who filed for salary arbitration and were to exchange salary figures with the team on Tuesday. The others are right-handed reliever Brandon League, first baseman Casey Kotchman, and ace right-hander Felix Hernandez, who reportedly has agreed to a five-year, $80 million contract extension.
Even so, Hernandez submitted an $11.5 million figure through salary arbitration, and the Mariners countered with a $7.2 million offer. Hernandez made $3.8 million last season.
Kotchman, who made $2.885 million last season, is seeking a $3.9 million contract while the Mariners offered $3.135 million. League, who made $640,000 with the Blue Jays in 2009, is asking for $1.325 million, while the Mariners offered $900,000.
Negotiations with arbitration-eligible players may continue until a potential hearing is held between Feb. 1-19.
Aardsma, acquired from the Red Sox for a Minor League pitcher last offseason, moved into the ninth-inning role in early May and became one of the most dependable closers in the Major Leagues.
The 28-year-old was 38-for-42 in save opportunities and led the American League with 18 quality saves, defined as coming into a game with the tying run in scoring position or protecting a one-run lead for at least one inning.
He entered the season with no career saves.
"I think both sides are very happy" said Aardsma, who made $419,000 in 2009. "Now, I have to go out there and do it again this year."
Lowe, like Aardsma, was eligible for salary arbitration for the first time in his career. Lowe was 2-7 with a 3.26 ERA in 75 appearances for the Mariners in 2009.
Jim Street is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.