Vargas is owed just over $1 million in salary for the remainder of the year while Millwood is due just over $200,000.
The 29-year-old Vargas has a 3.75 ERA and is averaging 5.6 strikeouts and 2.3 walks per nine innings. He also boasts a 40.8 percent ground ball rate in 180 innings of work. One area of concern is the disparity between his effectiveness at home vs. on the road. At the pitcher-friendly Safeco Field, Vargas has posted a 2.62 ERA while struggling to a 4.63 mark on the road.
Millwood, however, has been equally as effective both at home and on the road, though at 37 years old, he is not as coveted as Vargas. The Mariners signed him to a minor-league deal in January, and he's managed to become one of baseball's most productive minor league signees of 2012.
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