According to sources close to Ken Rosenthal of FOXSports, the Mariners are trying to trade closer David Aardsma. He adds that free agent right-handed pitcher Kevin Gregg may be a replacement for Aardsma in Seattle.

Aardsma made $2.75 million in 2010, and stands to make a significant raise in 2010 from arbitration. The right-hander will also be eligible for salary arbitration next winter before in becomes a free agent after the 2012 season.

Aardsma, 29 later this month, was 0-6 with a 3.44 ERA and 31 saves in 2010 with the M’s. He achieved a career high of 38 saves with Seattle with a 2.52 ERA in 2009.

It’s believed that the Baltimore Orioles are close to signing Gregg to a two-year, $12 milion deal. The 32-year-old right-hander was 2-6 with 37 saves and a 3.51 ERA in 63 appearances last season with the Toronto Blue Jays. Gregg was paid $2.75 million this season. Gregg had team options for 2011 and 2012 (worth $4.5 million and $4.25 million respectively), but the Jays declined both options early in November.