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Baseball Trade Values assigns Luis Castillo a surplus value of $7 million and Trevor Story a negative value of $66.3 million.
On a side note, is Marcelo Mayer anywhere near MLB-ready?
Last fall this forum hosted a brief debate on whether Seattle would be interested in Mayer when the Mariners already have top middle infield prospects. The Athletic's Keith Law recently ranked two Seattle shortstop prospects -- Colt Emerson at No. 5 and Felnin Celesten at No. 24 -- ahead of Mayer, who landed at No, 28 overall.
Emerson and Celesten, who are 19 years old, are a few years off but a third Seattle shortstop prospect, 21-year-old Cole Young at No, 45, is considered an outside candidate to make his MLB debut this year.
Neither Mayer nor Young, who is seven months younger than Mayer, have played an inning above Double A. Compare their career lines at the Double A level:
MM 120 G, 524 PA, .264/.328/.435/.763, 80 R, 14 HR, 58 RBI, 17 SB
CY 124 G, 552 PA, .271/.369/.390/.759, 67 R, 9 HR, 57 RBI, 23 SB
Let's hope both Mayer and Young have productive MLB careers.