Walker, 30, is entering his fourth and final year of arbitration eligibility after earning $8 million this past season. As Passan notes, Walker could earn upwards of $10 million in arbitration. He becomes eligible for free agency after the 2016 season.
This past season, Walker batted .269/.328/.427 with 16 home runs and 71 RBI, which are above-average numbers, particularly for a second baseman. However, by his lofty standards, it was a down year for him. By adjusted OPS (also known as OPS+), which accounts for league and park factors and sets 100 as the average, his 107 graded out as a career-low since he began playing regularly in 2010.